What Are Synology NAS Product Refreshes and What is Synology’s Logic?

When Synology introduces a new wave of NAS devices, it’s easy to assume that each new model is a significant leap forward. However, many of these launches are better classified as product refreshes, not entirely new product lines. This distinction matters. A refresh typically reuses a core hardware platform—such as the chassis, CPU, or layout—but includes modest updates like better network interfaces, more memory, or small component shifts. In 2025, Synology rolled out one of its broadest refresh cycles in years, affecting models across their two-bay, four-bay, five-bay, and eight-bay portfolios. Understanding what a refresh actually is helps users make more informed decisions, especially when evaluating whether to upgrade or wait.

Synology refreshes its products for a few practical reasons. First, component availability and pricing change over time. CPUs and other hardware elements that were once expensive or reserved for high-tier models often become more affordable, making them suitable for use in lower-tier devices. For example, the AMD V1500B processor, once exclusive to mid-tier and enterprise NAS systems, has trickled down into several 2025 refreshes like the DS925+ and DS1525+. Similarly, market-wide transitions—such as the shift from 1GbE to 2.5GbE—are reflected in these updates, allowing Synology to modernize existing models while keeping their manufacturing costs and prices relatively stable.

One of the key things that sets a refresh apart from a brand-new NAS model is Synology’s commitment to product tier consistency. Devices like the DS725+, DS425+, or DS1825+ aren’t being built to reinvent the wheel. Instead, they exist to preserve the price-to-performance balance that their predecessors established in the Synology product lineup. By holding onto the same CPU, expanding RAM slightly, and upgrading network ports from 1GbE to 2.5GbE, Synology keeps these NAS solutions within their traditional target audience—be it home users, prosumers, or small businesses. The physical design and key feature sets are familiar, and that’s deliberate. Refreshes aim to improve what already works, not redefine the category.

It’s also worth recognizing that Synology’s product refreshes are not aimed at recent buyers. If you just picked up a DS723+ or DS923+ last year, you are not the intended audience for the DS725+ or DS925+. Instead, these refreshes are aimed at users still running a DS216+, DS416, or DS1813+—users who are five to ten years deep into their existing systems. For them, the new hardware represents a meaningful leap forward, even if it looks modest on paper. When you compare a DS916+ to a DS925+, the differences in memory, CPU threads, M.2 caching, and DSM features become much more pronounced.

Pricing also plays a central role in Synology’s refresh strategy. For the most part, Synology tries to keep prices stable across generations, despite inflation and rising manufacturing costs. For example, the DS425+ and DS225+ refreshes, though modest in their hardware upgrades (mainly 2.5GbE LAN replacing 1GbE), still aim to hit the same price points as their DS423+ and DS224+ predecessors. This can make refreshes seem less appealing to new buyers comparing specs on a chart, but it serves long-term users who value Synology’s software ecosystem, consistent performance, and extended support.

One notable outlier in Synology’s refresh strategy is the continued use of the Intel Celeron J4125 processor, particularly in models like the DS425+, DS225+, and DS625slim. Despite Synology’s tendency to update hardware every 2–3 years based on market trends and component availability, the J4125—originally launched in 2019—feels increasingly outdated in 2025. Intel itself has moved away from the Celeron/J-series naming convention entirely, transitioning to more efficient and capable platforms like Alder Lake-N and N-series processors. This shift highlights just how long in the tooth the J4125 has become. With no support for newer instruction sets, lower efficiency compared to modern equivalents, and limited future compatibility, its continued presence in refreshed Synology NAS models stands in stark contrast to the broader trend of hardware advancement. While Synology has prioritized price consistency and DSM support, the persistence of this older CPU dampens the appeal of these refreshes for new buyers who expect more current internals at a similar price point.

Another important factor is Synology’s software-first development model. Their NAS hardware isn’t meant to push technical limits but rather serve as a stable, reliable platform for DSM (DiskStation Manager). That’s why even in refreshes, the focus is on compatibility and long-term support over flashy specs. Synology has made this clear through product cycles like the DS1825+, which retains the same CPU as the DS1821+ but gains 2.5GbE and better memory configuration—supporting the increasing demands of DSM applications without needing an overhaul of the entire system.

In summary, a product refresh in Synology’s ecosystem is not a groundbreaking redesign, but a thoughtful, incremental update within an established product profile. These refreshes ensure the long-term viability of key NAS tiers while adapting to evolving market standards like 2.5GbE, more demanding software workloads, or new expansion options. For long-time users, they offer an accessible upgrade path. For newcomers, they may seem underwhelming on paper. But in either case, they represent a balancing act between hardware, price, and software synergy, which has long been Synology’s model—whether you agree with it or not.

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Synology DS1825+ vs DS1821+ NAS Comparison – Get It Right, FIRST TIME!

When Synology releases a new NAS in its “Plus” lineup, users often expect a blend of practical improvements, long-term support, and a reasonable upgrade path from the previous generation. The Synology DS1825+ arrives in 2025 as the official successor to the 2020/2021-released DS1821+, carrying over much of the same core design while introducing selective enhancements—and a few contentious changes. Both are 8-bay desktop NAS systems targeted at advanced home users, small businesses, and content creators who need multi-user access, flexible RAID configurations, and extensive app support. However, while the DS1821+ was praised for its broad compatibility and modular connectivity, the DS1825+ adopts a more tightly controlled hardware ecosystem. In this comparison, we break down the key differences across hardware, ports, storage capabilities, DSM software features, and drive compatibility so you can decide which model truly fits your long-term needs—without second-guessing your choice later.

Synology DS1825+ vs DS1821+ NAS Comparison – Internal Hardware

At the center of both the Synology DS1821+ and DS1825+ is the AMD Ryzen V1500B processor, a 4-core, 8-thread embedded SoC with a 64-bit architecture and a base frequency of 2.2 GHz. This chip, built on the Zen architecture, offers a balance of power efficiency and multi-threaded performance suited for environments with simultaneous multi-user file access, virtual machines, and complex RAID configurations. Synology’s decision to retain the same processor in the DS1825+ reflects confidence in its reliability and capability. However, for users hoping for a jump to Zen 2 or Zen 3-based hardware, the lack of a CPU upgrade could be a disappointment—especially considering that competing vendors have started adopting newer architectures for their mid-range systems. Still, for typical NAS tasks that do not involve on-the-fly 4K video transcoding or GPU-heavy operations, the V1500B remains a stable and effective platform with AES-NI encryption support and virtualization compatibility across VMware, Hyper-V, and Docker workloads.

Thermal and power characteristics between the two systems remain largely consistent, with both featuring dual 120mm fans and an internal 250W PSU that can handle full drive loads with expansion units attached. The DS1821+ and DS1825+ are also nearly identical in physical size and structure, though the newer model has a slightly higher idle noise level—23.8 dB(A) versus 22.2 dB(A)—due to denser internal configuration and possibly fan speed curve adjustments. From an operational standpoint, the DS1825+ is marginally more power-efficient in idle states, consuming just 18.34W during HDD hibernation compared to 26.18W in the DS1821+. These marginal differences suggest a refinement in system tuning, although not a radical redesign. Overall, while the DS1825+ doesn’t revolutionize internal hardware, its doubled memory and subtle optimizations give it the edge for users planning to push DSM with multiple services or those who prefer an upgrade-free deployment experience.

Synology DS1825+ vs DS1821+ NAS Comparison – Ports and Connections

One of the most tangible areas of differentiation between the DS1821+ and DS1825+ lies in their external connectivity. The older DS1821+ is equipped with four 1GbE RJ-45 LAN ports, a familiar configuration that supports link aggregation and network redundancy. This setup was common in Synology’s mid-range lineup during its 2020–2022 releases, offering a total aggregated bandwidth of up to 4Gbps—assuming your switch infrastructure supports it. For many small business users, this array of ports provided simple flexibility: you could dedicate individual ports for different services or bond them for faster file transfers. However, in practice, 1GbE is increasingly becoming a limiting factor for modern workloads, especially in environments with large raw video files, database access, or multiple users performing high-speed backups.

Beyond networking, the DS1825+ introduces a notable change in expansion port design. The DS1821+ includes two eSATA ports for attaching Synology DX517 expansion units, which align with legacy expansion practices. In contrast, the DS1825+ replaces these with two USB-C-based expansion ports, designed specifically for use with the newer DX525 expansion units. While this doesn’t directly affect day-to-day operations, it signals a move toward a USB-based proprietary interface for future expansion, likely with more streamlined cabling and higher throughput potential. Additionally, the DS1825+ trims down from four USB 3.2 Gen 1 ports to three, a minor trade-off that may impact users with multiple USB-connected devices such as UPS units or backup drives. Still, for most users, the improved network and expansion standards make the DS1825+ more forward-looking, even if it reduces legacy connectivity options found on the DS1821+.

Synology DS1825+ vs DS1821+ NAS Comparison – Storage

Both the DS1821+ and DS1825+ offer eight front-facing SATA drive bays, supporting 3.5″ HDDs and 2.5″ SSDs, with hot-swappable trays for easy maintenance and upgrades. On the surface, storage capacity and configuration appear nearly identical: both models can scale up to 18 total drives using two Synology expansion units and support RAID levels including SHR, RAID 5, 6, and 10. This makes either system a viable choice for users with large datasets, whether for media, surveillance, or business-critical file hosting. However, subtle distinctions in how storage can be configured and expanded in each model make a significant difference over time.

Storage Feature	Synology DS1821+	Synology DS1825+
Drive Bays	8 × 3.5″/2.5″ SATA (hot-swappable)	8 × 3.5″/2.5″ SATA (hot-swappable)
Max Drive Bays (with Expansion)	18 (via 2 × DX517)	18 (via 2 × DX525)
M.2 NVMe Slots	2 × M.2 2280 (cache only, 3rd-party SSDs allowed)	2 × M.2 2280 (cache or storage pools, Synology-only SSDs)
Max Single Volume Size	108 TB	200 TB (requires 32 GB RAM)
Max Internal Volumes	64	32
Supported RAID Types	SHR, JBOD, RAID 0, 1, 5, 6, 10	SHR, JBOD, RAID 0, 1, 5, 6, 10
Third-Party HDD/SSD Support	Fully supported (with warnings)	Blocked at install/init if not verified
Storage Pool Creation with Unverified Drives	Allowed	Blocked
Storage Pool Expansion (Unverified Drives)	Supported	Blocked
RAID Recovery with Unverified Drives	Supported	Blocked
Hot Spare (Unverified Drives)	Supported	Blocked
Storage Manager Behavior (Unverified Drives)	Warnings shown, but system fully functional	Persistent alerts, some functions disabled

The DS1825+ supports storage pools using its two internal M.2 NVMe slots, something the DS1821+ does not. On the older model, those slots are limited strictly to SSD caching, and even then, Synology allowed users to use third-party NVMe drives for read/write acceleration. In the DS1825+, Synology enables users to form full storage pools using M.2 SSDs—but only if those SSDs are from Synology’s own SNV3400 or SNV3410 series. This adds flexibility in theory, especially for users interested in all-flash configurations or high-speed tiers, but restricts user choice in practice. The DS1821+ offers more freedom in selecting SSDs and hard drives, with only non-blocking warning messages when using unverified models, while the DS1825+ actively blocks storage pool creation and system initialization with unlisted drives.

This tightening of compatibility extends into pool expansion, RAID rebuilds, and even hot spare assignments. In the DS1821+, users could freely mix third-party drives and expand pools over time using available or similarly specced HDDs—even those not on the official compatibility list. The DS1825+ takes a stricter approach: attempts to initialize DSM with unverified HDDs will fail, and pool expansion or RAID recovery with unsupported drives is outright blocked. While existing volumes from older NAS systems can still be migrated and booted, they will trigger persistent compatibility warnings in DSM, often with degraded system health indicators. This shift may offer Synology more control over performance validation and support consistency, but it limits flexibility for users relying on diverse or existing storage media—making the DS1821+ a better option for those with a mix-and-match approach, and the DS1825+ more suitable for fully standardized Synology deployments.

Synology DS1825+ vs DS1821+ NAS Comparison – DSM Capabilities

Both the DS1821+ and DS1825+ are powered by Synology’s DiskStation Manager (DSM) 7.2 operating system, offering access to a rich suite of applications for file management, backup, surveillance, virtualization, and cloud syncing. Core tools such as Synology Drive and Synology Photos provide a private cloud alternative to services like Google Drive or Dropbox, while packages like Hyper Backup and Active Backup for Business enable full-system and client-based data protection strategies. These services run similarly on both systems, but hardware differences can influence practical performance. For example, the DS1825+ ships with 8 GB of ECC memory by default, making it more responsive when running multiple DSM apps in parallel—such as Snapshot Replication combined with Virtual Machine Manager and Drive Client Sync. In contrast, the DS1821+ ships with 4 GB of memory, which may require an upgrade before achieving similar multitasking fluidity, especially in environments with more than a few simultaneous users.

DSM Feature / Capability	Synology DS1821+	Synology DS1825+
DSM Version	DSM 7.2+	DSM 7.2+
Max Internal Volumes	64	32 ▼ Reduced
Max Single Volume Size	108 TB	200 TB (requires 32 GB RAM) ▲ Increased
Snapshot Replication	256 per shared folder / 4,096 total system snapshots	256 per shared folder / 4,096 total system snapshots
Virtual Machine Manager (VMM)	Up to 8 VM / Virtual DSM instances	Up to 8 VM / Virtual DSM instances
Surveillance Station	Up to 40 cameras / 4K / 1,200 FPS (H.265)	Up to 40 cameras / 4K / 1,200 FPS (H.265)
Synology Drive Users	Up to 110 users ▲ Higher	Up to 100 users ▼ Lower
Synology Office Users	Up to 110 concurrent users ▲ Higher	Up to 100 concurrent users ▼ Lower
Hybrid Share Folder Support	10	10
High Availability Support	Yes	Yes
RAID Recovery (with unverified drives)	Supported	Blocked
Hot Spare / Expansion (unverified drives)	Supported	Blocked
Storage Manager (Unverified Drives)	Warnings only, system fully functional	Persistent alerts, functions blocked
M.2 NVMe Storage Pools	Not supported	Supported (Synology NVMe SSDs only)
M.2 NVMe Caching with 3rd-party SSDs	Supported	Blocked
Protocols Supported	SMB1/2/3, NFSv3/v4, FTP, WebDAV, Rsync, iSCSI, HTTP/HTTPS, LDAP	SMB1/2/3, NFSv3/v4, FTP, WebDAV, Rsync, iSCSI, HTTP/HTTPS, LDAP

Differences emerge in how each system handles volume structure and scaling. The DS1821+ supports up to 64 internal volumes, giving it an advantage in deployments where users need to segregate workloads—for instance, separating surveillance footage, shared team folders, user home directories, and VM storage into distinct volumes for quota management and performance tuning. This flexibility makes the DS1821+ better suited for educational institutions or small business IT teams who manage multiple user groups and need clear storage separation. The DS1825+, on the other hand, limits internal volumes to 32 but increases the maximum single-volume size to 200 TB (with 32 GB RAM installed). This makes it better aligned with large, contiguous workloads like uncompressed 4K video editing archives, security footage retention for legal compliance, or massive CAD/CAM datasets—all of which benefit more from fewer, larger volumes than from numerous smaller ones.

Service limits within DSM also subtly differentiate the two models. The DS1821+ is rated for up to 110 concurrent users in Synology Drive and Office, whereas the DS1825+ recommends a slightly lower threshold of 100 users. While the difference is marginal, it may reflect the DS1825+’s tighter memory tuning or more restrictive compatibility model, which now relies on verified Synology storage media for optimal performance. For example, in environments running Synology Office with real-time collaborative editing—paired with Drive, MailPlus, and external file sharing through WebDAV—the DS1821+ might offer more flexibility when loaded with third-party high-performance SSDs for caching. The DS1825+, restricted to Synology’s own SNV3400/3410 NVMe drives, demands tighter ecosystem compliance, which could affect responsiveness if storage performance becomes a bottleneck. Nonetheless, both models offer full support for advanced DSM modules like Synology High Availability, SAN Manager, and Hybrid Share, ensuring that users deploying in mission-critical environments still have access to the high-availability and hybrid cloud features that define Synology’s enterprise-ready platform.

Synology DS1825+ vs DS1821+ NAS Comparison – Conclusion

Choosing between the Synology DS1825+ and DS1821+ comes down to whether you prioritize modern hardware refinements or broader long-term flexibility. The DS1825+ introduces subtle but meaningful upgrades: faster 2.5GbE connectivity, double the base memory, and NVMe storage pool support—features that clearly position it as the more forward-thinking choice for users committed to staying within the Synology ecosystem. However, these improvements come with tighter restrictions, most notably in its rigid drive compatibility policy. DSM cannot be installed unless only Synology-verified drives are used, and the system actively blocks unverified drives from being used in storage pools, RAID rebuilds, or even hot spare configurations. In contrast, the DS1821+ offers more freedom—supporting a wider range of HDDs and SSDs, allowing RAID recovery and expansion with non-Synology drives, and presenting a cleaner, less obstructive DSM experience when migrating from older hardware. While it may lack the newer model’s out-of-the-box performance gains, its open-ended architecture gives users—especially those with legacy drives or mixed environments—more breathing room. For users building a NAS from scratch and willing to adopt Synology’s closed hardware ecosystem, the DS1825+ is a capable and streamlined solution. But for those looking to extend the life of existing hardware or retain control over their storage media choices, the DS1821+ remains the more versatile and user-friendly option.

Aspect	Synology DS1821+	Synology DS1825+
Pros	– Full support for 3rd-party drives (HDDs & SSDs)	– Higher default RAM (8 GB ECC pre-installed)
	– Supports RAID recovery, expansion, and hot spares with unverified drives	– 2.5GbE networking (faster out-of-the-box performance)
	– More flexible for DIY and legacy system migrations	– NVMe storage pool support (Synology SSDs only)
	– Supports more internal volumes (up to 64)	– USB-C expansion ports with newer DX525 units
	– Better choice for mixed-brand or cost-conscious deployments	– Improved volume scaling (up to 200TB per volume with RAM upgrade)
Cons	– Older network setup (1GbE x4, slower unless aggregated)	– Strict drive compatibility enforcement (Synology-only drives required)
	– No NVMe storage pool support	– Blocks DSM install with unverified drives
	– Lower default memory (4 GB, upgrade likely needed for advanced workloads)	– Fewer internal volumes supported (32 max)
		– Persistent system warnings when migrating existing arrays with non-Synology drives
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Synology DS1825+ NAS Revealed – New 8 Bay NAS on the Block

Synology has quietly launched the new DS1825+ NAS, an 8-bay desktop solution aimed at prosumers, creative professionals, and small businesses in need of high-capacity, high-reliability network storage. Replacing the 2020-era DS1821+, this new model has debuted across eastern markets including Taiwan, Japan, China, and Australia, with broader availability expected within the coming month. While the DS1825+ shares the same AMD Ryzen V1500B processor as its predecessor, it introduces meaningful upgrades in system memory, network connectivity, and expansion port design. This release also reflects Synology’s increasingly closed hardware ecosystem approach, particularly in terms of drive compatibility. With pricing expected to be similar to the DS1821+—around $999 to $1099 USD—the DS1825+ positions itself as an incremental yet strategically significant refresh in Synology’s “Plus” lineup.

Synology DS1825+ NAS – Hardware Specifications

The DS1825+ is powered by the AMD Ryzen V1500B, a quad-core, 64-bit processor running at 2.2 GHz. This is the same CPU used in the DS1821+, and while it lacks a performance boost on paper, it continues to deliver reliable, multi-threaded performance suited for virtualization, large file transfers, and simultaneous user workloads. The system comes with 8 GB of DDR4 ECC SODIMM memory pre-installed, up from 4 GB in the DS1821+, and supports up to 32 GB across two slots. ECC memory adds an additional layer of data protection by automatically correcting memory errors—a key consideration for business-critical environments.

Component	Specification
CPU	AMD Ryzen V1500B (4-core, 64-bit, 2.2 GHz)
Memory (Pre-installed)	8 GB DDR4 ECC SODIMM (1 × 8 GB)
Memory (Max Capacity)	32 GB (2 × 16 GB)
Drive Bays	8 × 3.5″/2.5″ SATA HDD/SSD (Hot-swappable, except M.2)
M.2 NVMe Slots	2 × M.2 2280 NVMe SSD (for caching or storage pools, Synology drives only)
Max Drive Bays (with Expansion)	18 (with 2 × DX525 via USB-C)
LAN Ports	2 × 2.5GbE RJ-45 (Link Aggregation / Failover supported)
USB Ports	3 × USB 3.2 Gen 1
Expansion Ports	2 × USB Type-C (for DX525 expansion units)
PCIe Slot	1 × PCIe Gen3 x8 (x4 link)
Cooling	2 × 120 mm fans (user-replaceable; Full-Speed, Cool, Quiet modes)
Power Supply	Internal 250W PSU
Power Consumption	60.1W (Access) / 18.34W (HDD Hibernation)
Noise Level	23.8 dB(A) (Idle with Synology drives)
Dimensions (H × W × D)	166 mm × 343 mm × 243 mm
Weight	6.0 kg
Operating Temperature	0°C to 40°C
Drive Compatibility	Only Synology-verified HDDs and SSDs supported for full functionality

In terms of connectivity and expansion, the DS1825+ introduces two 2.5GbE RJ-45 LAN ports, replacing the older model’s four 1GbE ports. This change offers significantly higher throughput potential out of the box, particularly for multi-user environments or those running link aggregation. For further scalability, the unit includes one PCIe Gen3 x8 slot (x4 link), which supports 10GbE or 25GbE network interface cards. Additionally, Synology has swapped out the traditional eSATA expansion ports in favor of two USB-C-based connectors, used to link up to two DX525 expansion units, increasing total drive support to 18 bays.

Drive flexibility is offered through eight 3.5”/2.5” SATA drive bays and two M.2 2280 NVMe slots for SSD caching or storage pools – though we will return to the subject of just how flexible drives are in this system in a wee bit. The NVMe slots are not hot-swappable and are positioned internally, but provide a route for improving IOPS performance. Two 120mm fans handle cooling with configurable profiles, and the system operates at an idle noise level of 23.8 dB(A), slightly louder than the DS1821+ but still relatively quiet for an 8-bay desktop NAS. The DS1825+ also retains a 250W power supply, with typical access power consumption rated at 60.1W.

Synology DS1825+ NAS – DSM Software Specifications

The DS1825+ runs Synology’s DiskStation Manager (DSM), a Linux-based operating system that brings a wide array of software features designed for both home and business environments. Core functionalities include Synology Drive, which supports up to 100 users for cloud-style file syncing and sharing, and Synology Office, which enables real-time collaborative editing across documents, spreadsheets, and slides with similar user caps. For data protection, Snapshot Replication allows up to 256 snapshots per shared folder and 4,096 total system snapshots, while Hyper Backup and Active Backup for Business provide comprehensive options for client and server backups. Surveillance Station is also included with two default IP camera licenses and supports up to 40 1080p or 4K streams, depending on codec and frame rate, making it suitable for medium-scale surveillance setups.

One area where the DS1825+ makes a notable shift is in its storage pool policies. While the M.2 NVMe SSD slots can be used to create dedicated storage pools in addition to cache, this functionality is locked behind strict hardware validation. Only Synology-certified drives—specifically the SNV3400 series—are permitted for this role. This tighter integration may offer improved thermal management and reliability assurances but represents a step away from the broader compatibility seen in previous Plus-series devices.

Synology DS1825+ NAS vs the DS1821+ NAS

At first glance, the DS1825+ and DS1821+ appear nearly identical in core architecture, both using the AMD Ryzen V1500B processor and offering 8 drive bays with optional expansion to 18. However, the DS1825+ introduces several hardware-level improvements that cater to modern network environments. These include a bump in default RAM from 4 GB to 8 GB, upgraded LAN ports from four 1GbE to two 2.5GbE, and a shift from eSATA to USB-C-based expansion for DX525 units. These changes may not result in dramatically different performance under all conditions but do reflect a push toward better bandwidth utilization and a more consolidated hardware platform. Additionally, while the PCIe slot remains the same (Gen3 x8, x4 link), users looking to upgrade to 10GbE or 25GbE networking will benefit from increased LAN speed potential out of the box.

Category	Synology DS1821+	Synology DS1825+
CPU	AMD Ryzen V1500B (4-core, 2.2 GHz)	AMD Ryzen V1500B (4-core, 2.2 GHz)
System Memory (Default)	4 GB DDR4 ECC SODIMM	8 GB DDR4 ECC SODIMM
Max Memory	32 GB (2 × 16 GB)	32 GB (2 × 16 GB)
Drive Bays	8 × 3.5″/2.5″ SATA (Hot-swappable)	8 × 3.5″/2.5″ SATA (Hot-swappable)
Expansion Support	Up to 18 drives (2 × DX517 via eSATA)	Up to 18 drives (2 × DX525 via USB-C)
M.2 NVMe Slots	2 × M.2 2280 (cache only)	2 × M.2 2280 (cache or storage pools, Synology SSDs only)
LAN Ports	4 × 1GbE RJ-45	2 × 2.5GbE RJ-45
USB Ports	4 × USB 3.2 Gen 1	3 × USB 3.2 Gen 1
Expansion Ports	2 × eSATA	2 × USB Type-C
PCIe Slot	1 × PCIe Gen3 x8 (x4 link)	1 × PCIe Gen3 x8 (x4 link)
Cooling	2 × 120mm fans	2 × 120mm fans
Power Supply	250W internal	250W internal
Power Consumption (Access)	59.8W	60.1W
Power Consumption (HDD Hibernation)	26.18W	18.34W
Noise Level (Idle)	22.2 dB(A)	23.8 dB(A)
Dimensions (H × W × D)	166 × 343 × 243 mm	166 × 343 × 243 mm
Weight	6.0 kg	6.0 kg
Drive Compatibility	Broad third-party drive support (with warnings)	Only Synology-verified drives supported

That said, the DS1825+ introduces certain trade-offs compared to its predecessor. While the DS1821+ maintained broader compatibility with third-party hard drives and SSDs, including full DSM functionality even with unverified drives, the DS1825+ enforces a stricter hardware compatibility policy. As a result, users are now limited to Synology-verified drives for core functions like volume creation and SSD caching. This shift may benefit system reliability and warranty alignment but could deter users with existing non-Synology storage media or those seeking cost-effective alternatives. Moreover, while the DS1825+ enables a higher potential single-volume size (200 TB with expanded memory), it actually reduces the number of internal volumes from 64 to 32, which may be a consideration for more advanced or segmented storage environments.

Category	DS1821+	DS1825+
DSM Version	DSM 7.2+	DSM 7.2+
Max Internal Volumes	64	32 ▼ Reduced
Max Single Volume Size	108 TB	200 TB (requires 32 GB RAM) ▲ Increased
M.2 SSD Storage Pools	Not supported	Supported (Synology NVMe only) ▲ Added
Third-Party Drive Support	Allowed (with warning banners)	Blocked during DSM install ▼ Restricted
Snapshot Replication	256 per folder / 4,096 total	256 per folder / 4,096 total
Synology Drive Users	110 ▲	100 ▼
Synology Office Users	110 ▲	100 ▼
Virtual Machines (VMM)	Up to 8 VM/Virtual DSM instances	Up to 8 VM/Virtual DSM instances
Surveillance Station Support	Up to 40 IP cameras (4K H.265: 480 FPS)	Up to 40 IP cameras (4K H.265: 480 FPS)
SMB Connections (RAM Expanded)	60	60
Hybrid Share Folders	10	10
High Availability Support	Supported	Supported
Snapshot / Backup Tools	Full support for Hyper Backup, Active Backup, Snapshot Replication	Full support for Hyper Backup, Active Backup, Snapshot Replication
Virtualization Integration	VMware vSphere, Windows Server, Citrix, OpenStack	VMware vSphere, Windows Server, Citrix, OpenStack
RAID Support	SHR, JBOD, RAID 0, 1, 5, 6, 10	SHR, JBOD, RAID 0, 1, 5, 6, 10
Syslog Throughput	1,000 events/sec	1,000 events/sec
Protocols Supported	SMB1/2/3, NFSv3/v4.1, FTP, WebDAV, Rsync, iSCSI, HTTP/HTTPS, SNMP, LDAP	SMB1/2/3, NFSv3/v4.1, FTP, WebDAV, Rsync, iSCSI, HTTP/HTTPS, SNMP, LDAP

Synology DS1825+ NAS – Hard Drive Compatibility

With the release of the DS1825+, Synology has fully adopted its stricter hardware validation policy, significantly limiting support for third-party hard drives and SSDs. Unlike earlier models such as the DS1821+, which allowed DSM installation and storage pool creation with non-verified drives (albeit with warning messages), the DS1825+ enforces compatibility checks at the system level. Currently, only Synology-branded drives — such as the HAT3300 and HAT5300 series HDDs, and the SAT5200 and SNV3400 SSDs — are included on the official compatibility list. Attempts to install DSM with unverified HDDs, including popular models like the Seagate IronWolf and WD Red Plus, result in a complete block at initialization. There is no option to bypass or ignore these restrictions, and DSM will not proceed past setup when such drives are detected.

This strict policy has also been observed during storage expansion and migration. Migrated volumes from older Synology systems using unverified drives will still mount successfully on the DS1825+, allowing users to retain access to their data. However, the DSM interface will persistently display warnings, error icons, and status alerts across the Storage Manager and system health panels.

Feature / Function	Pre-2025 Synology NAS<br>(e.g., DS1821+, DS920+, DS923+)	2025 Synology NAS<br>(e.g., DS1825+, DS925+, DS1525+)
DSM Installation – Verified Drives	Full support	Full support
DSM Installation – Non-Verified Drives	Allowed (with warnings)	Blocked completely
Drive Migration (Non-Verified Drives)	Fully functional, minor alerts	Works, but shows persistent warnings
Storage Pool Creation – Verified Drives	Fully supported	Fully supported
Storage Pool Creation – Non-Verified Drives	Allowed (with warnings)	Blocked
Storage Pool Expansion – Verified Drives	Fully supported	Fully supported
Storage Pool Expansion – Non-Verified Drives	Allowed (mixed arrays supported)	Blocked – drives flagged as incompatible
Hot Spare Assignment – Verified Drives	Fully supported	Fully supported
Hot Spare Assignment – Non-Verified Drives	Allowed	Blocked
RAID Recovery – Verified Drives	Supported	Supported
RAID Recovery – Non-Verified Drives	Supported	Blocked – system will not rebuild with unverified media
M.2 NVMe Cache – Synology SSDs	Supported	Supported
M.2 NVMe Cache – 3rd Party SSDs	Supported	Blocked
M.2 NVMe Storage Pools – Synology SSDs	Not supported	Supported
M.2 NVMe Storage Pools – 3rd Party SSDs	Not supported	Blocked
SMART Monitoring – Verified Drives	Full support	Full support
SMART Monitoring – Non-Verified Drives	Full support	Limited or blocked (TBC)
Storage Manager Alerts – Non-Verified Drives	Warnings, dismissible	Persistent, cannot be cleared
Overall Compatibility Flexibility	High – mix-and-match drives allowed	Low – walled-garden enforcement

These alerts cannot be dismissed or suppressed, and while they do not affect system operation, they may be problematic for less technical users or managed IT environments. Furthermore, expanding an existing storage pool with unverified drives is no longer allowed — even if the new drives are identical to those already in use. Tests confirm that DSM will refuse to integrate non-listed drives into a pool, issue compatibility errors for hot spare assignments, and block recovery attempts for degraded arrays using unverified media.

One exception, as currently observed in testing, involves SATA SSDs. While unverified 3.5” HDDs are completely blocked from use during initialization, certain non-Synology SATA SSDs can still be used to install DSM or create volumes. These drives are flagged with warnings post-installation, but DSM allows the setup to proceed. That said, these SSDs also carry ongoing status alerts, and users cannot combine them with verified HDDs in mixed arrays or use them to expand verified pools. M.2 NVMe support is even more restrictive — only Synology SNV-series SSDs are accepted for either caching or pool creation, and all third-party models are entirely blocked. For now, users relying on legacy or third-party drives face a clear trade-off: adopt Synology’s ecosystem fully or accept a range of functional and visual limitations that reduce overall flexibility.

Synology DS1825+ NAS – Price and Release

The Synology DS1825+ is currently available only in select eastern regions, including Taiwan, Japan, China, and Australia, with broader global availability expected to follow within the next few weeks. Based on current distribution information, retail listings, and typical rollout timelines, availability in North America, the UK, and Europe is anticipated by the end of May or early June 2025. While Synology has yet to confirm official regional pricing, early indications suggest the DS1825+ will launch at approximately $999 to $1,099 USD—on par with the original MSRP of the DS1821+. This pricing strategy maintains Synology’s established positioning for its 8-bay “Plus” series NAS models, appealing to both advanced home users and small business environments looking for scalable, reliable storage solutions.

As with recent releases in the 2025 Synology lineup, prospective buyers should pay close attention to official announcements and trusted retailers, particularly in light of increasing emphasis on bundled hardware and reduced third-party flexibility. The DS1825+ introduces modest but meaningful hardware changes—such as default 8GB ECC memory, dual 2.5GbE LAN, and USB-C expansion support—while retaining the same core CPU. Although it lacks a generational leap in processing power, the unit aims to refine the overall platform rather than reinvent it. However, potential buyers should be fully aware of the enforced drive compatibility limitations, which mark a shift from previous models and may impact long-term upgrade plans. For those seeking a dependable NAS with improved baseline specs and tighter integration into the Synology ecosystem, the DS1825+ presents a balanced, if slightly more controlled, successor.

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The Synology DS925+ NAS is (STILL) Coming..and Soon

ORIGINAL ARTICLE BELOW:

It is fast becoming the worst-kept secret in the world of network-attached storage, but Synology’s continued plans to launch refreshes of a number of their popular desktop devices received another public outing this weekend, when keen users on Reddit spotted the official pages for the Synology DS925+ and DX525 on Amazon.co.uk, listing hardware specifications, pricing, release dates, and general background info. Although the appearance of the DS925+ isn’t exactly surprising—given the large info drop semi-officially revealed at an official event by a user on Chiphell—it is nonetheless surprising to see these two official Synology products seemingly added by Synology themselves for Amazon distribution, yet with absolutely zero mention on the traditional Synology platforms (Synology Products, Synology Downloads, Synology Download Registry, etc). Nonetheless, this appearance has confirmed numerous details about the DS925+ hardware specifications, for good and for bad, so I wanted to go through the further confirmed specifications and what they mean.

Synology DS925+ NAS Confirmed Hardware Specifications

As previously alluded to last month in the previous leak, the Synology DS925+ will arrive with the already integrated CPU from AMD that featured on previous SMB releases—the V1500B. This is a quad-core CPU that allows for more cores, more threads (i.e. more vCPUs) than the R1600 in the DS923+, as well as a lower TDP—though also a lower total clock speed available at first. It arrives with 4GB of ECC memory that can be scaled up to 32GB via two SODIMM DDR4 slots. DS925+ includes 2 × 2.5GbE, a very welcome if somewhat overdue upgrade on this product series from Synology. The SSD compatibility for storage pools and the speed allocated to each slot is still TBC. The expansion capabilities of the DS925+ have changed from the long-running eSATA support and DX517 of older Synology devices and now lean towards popular USB-C, and this is what triggered the new DX525 expansion box. We are still awaiting confirmation of the confirmed speed of this USB-C port, as well as its broader compatibility for other things (given the larger variety of USB-C options available in the market compared with eSATA), but slides shown at the Synology partner event last month seemingly indicated that this will NOT be USB 3.2 Gen 2 10Gbps.

Probably the biggest and most controversial change here in the newer generation box is the removal of the mini PCIe upgrade slot that featured on the DS923+. The new DS925+ completely lacks this ability to scale up to 10GbE later down the line, which is probably going to upset a lot of users. PCIe modules they have sold (which would greatly explain, perhaps, the motivation for removing this feature), it is still something of a blow that this new generation device has removed a particularly appealing network upgrade path option. The motivation for this could be theoretically for multiple reasons, such as:

• Synology might well have deemed the two-times 2.5GbE network connectivity on the DS925+ sufficient for the four drives of SATA storage that it features, as well as ensuring that the system does not overlap other devices higher in the product portfolio food chain too much.
• The PCIe line distribution of this CPU and the chipset used on this board might result in limitations to the distribution of those lanes and therefore made the upgrade difficult to implement.
• The USB-C port for expansions may support a 10GbE upgrade module down the line that Synology intend on rolling out—a bit of a long shot though, as currently USB-C to 10GbE is only afforded to TB3/TB4/USB4 connectivity and would commit a great deal of internal lane distribution to that port to accommodate this potential upgrade.
• As previously alluded to, perhaps user integration of this upgrade slot on previous DS923+ devices was too low to justify accommodating this feature in the newest iteration.

Any of those reasons, or others, might well be why Synology decided to rescind this feature on this device. Nevertheless, it is something of a bitter pill that this device will not be featuring the ability to scale up out of the potential 5GbE bonded network connection that it arrives with and likely serves as a slight bottleneck to more high-performance hard drives in the SATA bays, as well as a significant cap on using SATA SSDs or M.2 NVMes in storage pools via the provided slots.

The AMD Ryzen R1600 and V1500B are both embedded CPUs used across Synology’s NAS lineup, but they serve distinct roles depending on the target user and workload. The R1600 is a dual-core, four-thread processor with higher clock speeds (2.6GHz base / 3.1GHz boost), making it ideal for environments that prioritize single-threaded performance—such as general file sharing, light server tasks, and basic backup operations. It has a TDP of 25W and is commonly found in more entry-level to mid-range Synology NAS models like the DS723+ and DS923+. By contrast, the V1500B is a quad-core, eight-thread CPU running at a lower base clock of 2.2GHz, but it delivers greater efficiency and significantly better multi-threading performance—essential for virtual machines, Docker containers, multiple user sessions, and parallel workflows. Its lower TDP of 16W also makes it a more efficient option for always-on deployments in business settings.

CPU Comparison: AMD Ryzen Embedded V1500B vs R1600

What makes the V1500B particularly notable in the DS925+ is that this CPU was previously reserved for Synology’s larger SMB and enterprise-tier systems, such as the DS1621+, DS1821+, and DS2422+. By introducing it into a prosumer-class 4-bay NAS, Synology is clearly continuing its long-standing trend of moving mature hardware platforms down into lower product tiers over time, as the cost of components becomes more accessible and manufacturing scales improve. This strategy enables Synology to offer higher-tier performance at mid-tier price points, effectively refreshing their product range while maintaining price consistency. For users who prioritize multi-tasking, virtualized workloads, or long-term scalability, the arrival of the V1500B in the DS925+ marks a significant shift in capability for this tier of NAS.

Want to Understand How Synology NAS Product Refreshes Work, as well as Why Synology Chooses Certain Hardware? Read my article below:

Synology DS925+ NAS HDD and SSD Compatibility?

Unfortunately, there is no mention of Synology’s position on third-party hard drive and SSD compatibility on the new DS925+ confirmed yet. Realistically, basing it on the predecessor and other Synology Plus Series devices, at the very least, we’re going to see a repeat of the priority towards Synology’s own series of hard drives and SSDs, with a handful of third-party drives from Seagate, Western Digital, and Toshiba added to the support list. This has now become the status quo with the majority of Synology Plus Series and above devices, and if this device rolls out with that, I’m not going to say that it’s perfect, but at the very least it does still leave a narrow window open for users to use third-party hard drives without the system spitting alerts or amber warnings at you during setup.

As the system is being listed on the Amazon pages without drives included, that at the very least removes the concern of many that Synology may have been proceeding down the pre-populated system route, or being more rigid on the lock-in of the drives you can use on the system. Nevertheless, there is still the matter of the M.2 NVMe slots and whether this system will continue with the policy of third-party drives only being supported for use as caching, whereas Synology’s own M.2 NVMe drives support both caching and storage pools. It will most certainly continue with this position.

Synology DS925+ NAS Price and Release Date?

As originally predicted last month, the pricing of the DS925+ will be largely the same as that of the DS923+, as Synology is always keen to maintain the pricing at each tier of its portfolio year on year—even if sometimes that can result in the hardware being a little more lean despite the cost of components going up. I kind of respect how long Synology has been able to maintain the same price for their prosumer 4-bay device, right? All the way back since 2015, it has always arrived at that similar £550 price. Keep in mind that the price listed on the early leaked Amazon.co.uk page includes VAT, whereas pricing listed in other countries like the U.S. will likely not include tax.

With regards to the intended release date and availability of the DS925+, the Amazon leak page appears to indicate the 7th of May. Now, whether this has always been the plan by the brand when refreshing all of its currently existing product line, or it is a launch date that has been changed rapidly in light of discussions surrounding tariffs and stock travelling around the world, is yet to be confirmed. Nevertheless, that seems like a fairly reasonable launch date in light of the information—originally appearing online with the product page added to Amazon on April 8th—and the slow but steady gear Synology goes through when making a product live across traditional online retailers. You can use the links below to monitor the availability and price of the Synology DS925+ on Amazon, as it will redirect to your own region via the link. Anything purchased via these links will result in a small commission to me (Robbie) and Eddie at NASCompares, which really helps us keep doing what we do.

Synology DS923+ vs DS925+ NAS – Buy Now or Wait?

When comparing the Synology DS923+ and DS925+, the differences are subtle but important depending on your priorities. Both NAS units share the same price point, run Synology’s DSM software with identical features, and include the same baseline 4GB DDR4 ECC memory (expandable up to 32GB). They also both lack integrated graphics, feature four SATA drive bays, and offer two M.2 NVMe Gen 3 slots for SSD caching. However, the DS925+ gains an edge in raw parallel processing power, featuring a quad-core, eight-thread AMD V1500B CPU, which translates to more virtual CPUs (vCPUs) for virtual machines and containerized applications. It also benefits from dual 2.5GbE ports, enabling up to 5GbE performance with Link Aggregation or SMB Multichannel, compared to the 2x 1GbE ports on the DS923+, which top out at 2GbE combined. Additionally, the DS925+ offers a faster expansion interface via USB-C (6Gbps) versus the older eSATA (5Gbps) on the DS923+.

That said, the DS923+ still holds certain advantages. Its AMD R1600 CPU features a higher clock speed, which may offer better single-threaded performance in lighter tasks or low-concurrency applications. Crucially, the DS923+ supports an optional 10GbE upgrade via its mini PCIe slot, a feature completely removed in the DS925+, which could be a deal-breaker for users planning to grow into a higher-speed networking environment. So, should users buy the DS923+ now or wait for the DS925+? If 10GbE upgradeability or faster per-core performance is important for your workload, the DS923+ is still a strong option. However, if you’re prioritizing multi-threaded performance, better default network speeds, and a more modern expansion standard, the DS925+ is the more forward-looking choice—particularly for virtualization and container-heavy environments. Ultimately, both devices serve the same class of user, but choosing the right one depends on whether your focus is scalability or efficiency out of the box.

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Synology DS401+ Review: A Big Leap in Data Portability

Synology has once again redefined innovation with the launch of its latest device, the DS401+, a radical departure from traditional NAS design. Unlike anything in their existing lineup, the DS401+ is a compact, ultra-portable single-bay system that arrives with 8GB of pre-installed storage.

While its modest appearance might lead some to question its capabilities, this device is full of surprises and packed with what Synology describes as “next-level user-driven expandability.” Upgrades are a breeze, requiring nothing more than confidence, persistence, and maybe a little brute force.

Connectivity is as streamlined as it gets, with USB 2.0 ensuring compatibility with virtually every system released in the past 20 years.

Performance skeptics will be pleasantly surprised to learn that the DS401+ boasts transfer speeds of up to 8GB per second—a metric achieved under rigorous, real-world conditions involving trajectory and velocity.

While traditional benchmarks focus on read/write speeds, Synology’s new direction explores the physics of momentum as an alternative measurement of data mobility. One of the standout features of the DS401+ is its offsite backup functionality.

Designed for those constantly on the move, users can effortlessly transfer data, pop the DS401+ into a bag, and take their backup anywhere—whether that’s to work, the grocery store, or an accidental adventure sparked by a missing cat collar, missing your train and leaving your bag at home – can’t question it, that’s a pretty solid off-site backup!

While the DS401+ doesn’t support DSM, Synology’s usual operating system, it does come with pre-installed software of a different nature. Details remain scarce, but early reports suggest a mysterious blend of anti-ransomware tools, possibly paired with rudimentary antivirus protection.

Whether this is a security feature or just a cleverly disguised README file remains to be seen. Nevertheless, the DS401+ clearly takes a bold stance on cybersecurity—even if no one knows exactly what it’s doing.

File sharing has never been more intuitive. With the DS401+, users can now share files simply by passing the device to someone else. There’s no need for network mapping, no passwords to remember, and absolutely no waiting for uploads. This tactile approach to data transfer offers unmatched immediacy and person-to-person encryption powered by trust. For those concerned about future expansion, Synology has teased a “Forb” edition, rumored to support even more aggressive upgrade techniques.

And for power users who demand more from their tiny NAS, Synology has introduced the DS401+ Forb, a “four-bay” variant that somehow fits into an even smaller form factor than the original. Early hands-on impressions describe it as “smaller than the palm of your hand but twice as confident.” While there’s no visible evidence of four bays, Synology assures customers that the extra capacity is there if you’re willing to think small enough. Expansion remains as simple as ever—just apply additional USB drives using light percussion.

The launch date of the Synology DS401+—April 1st—is no coincidence. Known globally as April Fools’ Day, it’s a time when tech companies occasionally tease products that walk the line between absurdity and brilliance.

From its minimalist design to its unconventional “performance” metrics, every detail feels like a carefully crafted nudge and wink to the audience. It’s a playful reminder that innovation sometimes requires not just thinking outside the box—but joking about the box entirely.

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New Synology NAS for First Half of 2025 Revealed – DS925+, DS1825XS+, DS625Slim, DS1525+ and More

After what seems like quite a while for many, we have finally got pretty large confirmation that Synology are refreshing a large number of their Desktop (and a couple of Rackmount systems) devices – as well as launching a few new storage media options. This new information arrives via ChipHell user ‘nineeast‘ in a recent forum post. I am still in the process of identifying the event that the photo below was taken from, but given the preponderance of people taking photos, it won’t be long before this spreads further. This is of course the potential that this is a hoax… but (as you will see later in the article) the chiphell post is not the only source. Nevertheless, it looks like Synology are getting set to refresh a huge number of solutions, launching their DS925+, DS425+, DS225+, DS1525+, DS1825+, DS725+, DS625slim, DS1825xs+ and RS2825RP+ between now and Summer 2025. So, let’s discuss what these refreshed devices bring and whether they deserve your data.

*Update* In order to better track each of the new Synology NAS revealed at this event, I have made update pages for each device below. Additionally, as mentioned in the video, I am canvassing user feedback on these new releases (ideally existing Synology NAS users and/or SIs – system integrators) for a follow up video soon. put your feedback in the comments below or in the Reddit thread HERE

• Synology DS925+ NAS News https://nascompares.com/news/synology-ds925-nas-news/
• Synology DS1525+ NAS Leak https://nascompares.com/news/synology-ds1525-nas-revealed/
• Synology DS425+ NAS Revealed https://nascompares.com/news/synology-ds425-nas-revealed/
• Synology DS1825+ NAS News https://nascompares.com/news/synology-ds1825-nas-news/
• Synology DS425+ NAS News https://nascompares.com/news/synology-ds425-nas-revealed/
• Synology DS1825xs+ NAS Revealed https://nascompares.com/news/synology-ds1825xs-nas-revealed/
• Synology DS225+ NAS News https://nascompares.com/news/synology-ds225-nas-revealed/
• Synolgoy DS625slim 6-Bay NAS Revealed https://nascompares.com/news/synolgoy-ds625slim-6-bay-nas-revealed/
• Synology DS725+ NAS Revealed https://nascompares.com/news/synology-ds725-nas-revealed/

Credit to nineeast on Chiphell forum

Which Synology Solutions were Revealed at the Synology Event?

The big deal here is that it is tremendously rare for Synology to reveal their roadmap of solutions, let alow share it with users in such a detailed fashion. Synology have always been tremendously restrained when it comes to revealing their product refreshes (and new product lines). That said, refreshes of products in their portfolio periodically is pretty normal, and most Synology solutions will see a refresh every 2.5-5years (depending on the product tier, with XS series devices generally having a longer refresh cycle), and many have been wondering about when a refresh to the x22/23 range of devices would arrive, and in what form it would take. The TLDR list of solutions shown were:

The biggest takeaway in these shared images seems to be that the bulk of the solutions in this 2025 year refresh are going to remain largely the same, but with two main changes across the board.

Credit to nineeast on Chiphell forum

Thise changes are 1GbE network interfaces will be upgraded to 2.5GbE interfaces universally, and expansion devices that would have previously used eSATA as a means of connectivity will now be USB-C (as well as a reshuffle of the CPUs in the product tiers/families around), but we will get onto that latter point in a moment. Further information and images have also been shared by user ‘ERROR204‘ on imnks, another storage *& network related forum, as well as bringing further information on the expansion devices. The DS1525+, DS925+ and DS725+ will serve as refreshes of the DS923+, DS723+ and DS1522+ NAS. It’s unclear whether they will be using that mini PCIe upgrade card like the existing series (the E10G20-T1-MINI) as the slide below indicates that they will not, but the DS925+ and DS1525+ will see the R1600 Dual Core / 4 Thread Ryzen processor in their predecessor replaced with the v1500B 4 Core / 8 Thread CPU (previously used in the 6/8/12 Bay desktop NAS devices. The DS725+ however will remain as the R1600, but will see the 1GbE NICs upgraded to 2.5GbE.

Credit to ERROR204 on imnks.com

Interestingly, the default memory on the DS725+ will increase to 4GB of ECC Memory (as opposed to the 2GB in the DS723+ predecessor). However the slide below also indicates that it will no longer support the mini PCIe 10GbE adapter. So it’s a mixed bag in the DS725+ refresh really. This slide also indicates that the USB-C connected expansion will seemingly remain at 6Gb/s transfer speeds – which is a little odd, given USB 3.2 Gen 1 is 5Gb/s and USB 3.2 Gen 2 is 10Gb/s – something to ponder.

Credit to ERROR204 on imnks.com

Next is the ‘media’ series of devices and also a return of the Synology SLIM series. The DS625slim arrives (refreshing the DS620slim from 2020) and the DS425+ and DS225+ arrive as refreshes for the comparatively (for Synology’s MO) new DS224+ and DS423+ NAS. These will be continuing to use the existing Intel J4125 Quad Core Celeron CPU from 2019/2020 (something I know will not please everyone), but will also see upgrades to 2.5GbE from the 1GbE on their predecessors. Additioanlly, I think we can assume the DS425+ will have the 2x M.2 NVMe slots of it’s predecessor.

Credit to ERROR204 on imnks.com

Now the DS925+ (a refresh of the DS923+) has the upgrade from the R1600 CPU to the V1500B CPU we mentioned earlier, alongside the new USB-C expansion support (the DX525) and 2.5GbE NICs, so I think we can assume the DS1525+ will be similarly reprofiled from the DS1522+, but I am unsure if it will have 2x USB-C ports instead of 2x eSATA (almost certainly, but not 100%). I think many user are going to have mixed feelings once again about the CPU choices present here in the bulk of these new refreshes.

Credit to ERROR204 on imnks.com

Now onto those two 8 Bay devices, the DS1825+ and DS1825xs+ (serving as refreshes of the DS1821+ and DS1823xs+ respectively). As covered in my video in 2024 about previously leaked information on the DS1825+, it seems that both of these devices will have the same CPU as their predecessor devices, but will see upgrades from their 1GbE ports towards 2.5GbE (with the DS1825xs+ maintaining it’s 10GbE copper connection). All other specifications (M.2 slots, expandability, memory, etc) will all seemingly remain the same – though I think we can once again assume that expansion ports will be USB-C in line with the DX525 box.

For many, it will be a little disappointing that we did not see a 6-Bay model arrive and in fact there has not actually been a 6-Bay Synology NAS since 2020 (when the DS1621+ and DS1621xs+ were launched), increasing fears that Synology are eliminating that tier of their portfolio. However, there is ZERO confirmation on this and the 6 Bay option in the Synology store is still present for the DS1621+ and DS620slim, though the DS1621xs+ has disappeared (likely replaced internally with the 8 bay XS option).

Finally, there is the storage media that was listed. Some drives we already knew about. For example, the SAT5221 Series of SATA SSDs already appeared on vietcorp (HERE), but the HAT3320 is seemingly a refresh/new line in the Synology Plus series of hard drives – and there have been rumours circling for a while that these would be Seagate Ironwolf drives, but currently unconfirmed.

Finally, there is the Synology SNV5420 series – a new M.2 NVMe media drive range, but it is currently unclear if this is a complete refresh of the SNV3400/SNV3410, or as the naming convention seems to indicate, a higher performance/class of M.2 NVMe SSDs. This is something that has been LONG DEMANDED as Synology still have a solid insistence on their systems/add-on cards with M.2 NVMe Support HAVE TO be their own media drives if you want to use the slots of Storage pools, yet the SNV3400 range and it’s variations are comparatively low speed and high priced vs the rest of the M.2 NVMe SSD market as a whole.

So, that’s everything we know so far. Let’s now discuss what we think together in the comments!

The New Synology 2025 Product Line Up – What I Like and What I Don’t!

I have mixed feelings about the entire Synology refreshed line up – on the one hand I DO think there is a meaningful refresh here on the DS925+ and DS1525+ NAS. No one was expecting Synology to completely change this product family, as they have already made it pretty clear that these two system profiles are designed now more for the SMB user, small business, container deployer and those with file processing needs – i.e not multimedia as the focus. So, them upgrading this from the R1000 CPU in the x23 series to a V1000 CPU (doubling the cores and threads) will be tremendously welcome – as will 2.5GbE out the box (though I would like more clarification on the E10G22-T1-MINI 10GbE upgrade card support – as it looks like this is now not supported and that would be a real shame). Also, as much as its a bummer to see the V1500B CPU that Synology have already had on their products in 2020 in these 4 and 5 Bay solutions, they ARE good follow up CPUs over the R1600 in profile, and still have a length support time with AMD backing them up. All that said, the DS725+ seems pretty hard done by here, in fact the DS425+, DS225+ and DS725+ all seem to essentially be the same NAS, but with the 1GbE NICs swapped out with 2.5GbE. I mean, if the price remains exactly the same as the DS423+, DS224+ and DS723+ (and no other hardware surprises arrive in the form of no NVMe slots, etc), then these are…technically…refreshes. But more like a DS224+II, than a whole new DS225+.

Regarding the Intel Celeron devices, I am a little puzzled more than anything else. 2.5GbE on these is good (even if we overlook the fact that 2.5GbE has been fairly standard on ALL NAS systems in place of 1GbE since 2020 from everyone else), but the J4125 CPU is a CPU that has long since retired by Intel (indeed, Intel Celeron naming itself is long gone in favour of the Alder Lake and Twin Lake N processors). So unlike the strong support afforded to the AMD processors I mentioned above, the J4125 seems a remarkably dated choice right now. Still, better some kind of graphical capable CPU in the line up than none at all. Still, odd choice. As there are a lot of holes in these specifications, it’s tough to make a full list of what is good and bad, plus we have to acknowledge that things CAN change during development. So, I’ll hold off for now with anything concrete on my own thoughts, but again, I would love to chat in the comments here or on YouTube for your own thoughts.

Things we still need confirmation on!

As I just mentioned, there are still a lot of gaps in these specs and till we have the full picture, we can’t judge anything! So, here are the questions I still have about these new refreshes that remain unanswered for now:

• HDD and SSD Compatibility, will it be largely the same as the existing 22/23/24 series devices (i.e largely Synology drives, but a few Seagate/WD/Toshiba drives), or will these new series be the first to arrive with strict Synology-only drive media and/or pre-population?
• How is the USB-C 6Gb/s? Is it an adapter, or a USB-C Port on the old lane internally?
• Where is the 6-Bay?
• Ambiguity at best, complete removal at worst, of the 10GbE upgradability of the 2/4/5 Bay V1500B option NAS’. Is this for real?
• Is the SNV5420 a new high performance M.2 NVMe?
• Why refresh all of these at the same time? Some solutions like the DS1823xs+ or DS224+ are very early in their expected run, so a refresh so soon seems unnecessary. So why now?

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