Synology DS925+ vs DS923+ NAS
The Synology DS925+ versus Synology DS923+ – Buy OLD or BUY New?
Every few years, when Synology chooses to refresh several of its popular devices—updating a number of its hardware features—new buyers and those looking to upgrade have a choice to make. Is it nobler in the mind to purchase the more affordable and already well-known older-generation device, or hold out and purchase the brand-new, refreshed, updated model with its improved hardware but likely slightly increased price tag? Refreshes are planned for 2025. Today, I want to discuss whether users should consider purchasing the DS923+—which has been in the market for several years now—or set their sights on the newer DS925+ NAS. On the face of it, many will consider this an easy choice, as newer hardware likely means a better system. However, the reality is much more nuanced. Alongside older-generation hardware having had a greater deal of time to be developed within its own ecosystem and by third-party developers, there is also the question of whether newer-generation hardware really is genuinely a hardware upgrade. Or do you have the potential to miss out on certain hardware features in the new generation that may have become legacy options (remember the DS920+?). Which one deserves your money and your data?
Synology DS925+ NAS |
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Synology DS925+ vs DS923+ – Hardware Specifications
When comparing Synology’s DS925+ and DS923+, it’s easy to assume the newer model automatically holds the advantage. However, a closer inspection of their hardware specifications reveals a more nuanced story where hardware changes in the 2025 Series are…mixed (that sounds fair, right?). While both systems cater to prosumers and small business users with high expectations for performance and reliability, they differ in several key areas—from CPU architecture and networking capabilities to expansion options and noise levels. Below, we break down the detailed hardware specifications of both NAS units side-by-side, highlighting where one system clearly outshines the other and where parity exists.
Category | DS925+
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DS923+
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Advantage / Notes |
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CPU Model | AMD Ryzen V1500B | AMD Ryzen R1600 | – |
CPU Cores / Threads | 4 Cores / 8 Threads | 2 Cores / 4 Threads | DS925+ offers more cores and threads |
CPU Frequency | 2.2 GHz | 2.6 GHz (base) / 3.1 GHz (turbo) | DS923+ has higher clock speeds |
Architecture | 64-bit | 64-bit | – |
Hardware Encryption Engine | Yes | Yes | – |
Memory (Pre-installed) | 4 GB DDR4 ECC SODIMM (1x 4 GB) | 4 GB DDR4 ECC SODIMM (1x 4 GB) | – |
Total Memory Slots | 2 | 2 | – |
Max Memory Capacity | 32 GB (2x 16 GB) | 32 GB (2x 16 GB) | – |
Drive Bays | 4 | 4 | – |
Max Drive Bays (with Expansion) | 9 (DX525 x1) | 9 (DX517 x1) | – |
M.2 Drive Slots | 2 (NVMe) | 2 (NVMe) | – |
Supported Drive Types | 3.5″ SATA HDD, 2.5″ SATA SSD, M.2 2280 NVMe SSD | 3.5″ SATA HDD, 2.5″ SATA SSD, M.2 2280 NVMe SSD | – |
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Hot Swappable Drives | Yes (SATA only) | Yes (SATA only) | – |
LAN Ports | 2 x 2.5GbE RJ-45 | 2 x 1GbE RJ-45 | DS925+ offers faster network ports |
USB Ports | 2 x USB 3.2 Gen 1 | 2 x USB 3.2 Gen 1 | – |
Expansion Port Type | USB Type-C | eSATA | DS925+ has a modern expansion port |
PCIe Slot | None | 1 x PCIe Gen3 x2 (network expansion) | DS923+ allows NIC upgrades |
Dimensions (HxWxD) | 166 x 199 x 223 mm | 166 x 199 x 223 mm | – |
Weight | 2.26 kg | 2.24 kg | DS923+ is slightly lighter |
System Fans | 2 x 92mm | 2 x 92mm | – |
Fan Modes | Full-Speed, Cool, Quiet | Full-Speed, Cool, Quiet | – |
LED Brightness Control | Yes | Yes | – |
Power Recovery | Yes | Yes | – |
Noise Level (Idle) | 20.5 dB(A) | 22.9 dB(A) | DS925+ is quieter |
Power Supply | 100W Adapter | 100W Adapter | – |
Power Consumption (Access / Hibernation) | 37.91 W / 12.33 W | 35.51 W / 11.52 W | DS923+ is slightly more power efficient |
BTU (Access / Hibernation) | 129.27 / 42.05 | 121.09 / 39.28 | DS923+ generates less heat |
Operating Temp | 0°C to 40°C | 0°C to 40°C | – |
Storage Temp | -20°C to 60°C | -20°C to 60°C | – |
Humidity | 5% to 95% RH | 5% to 95% RH | – |
Warranty | 3 years (extendable to 5 years) | 3 years (extendable to 5 years) | – |
The hardware comparison between the Synology DS925+ and DS923+ highlights that, while these two NAS models share a common design and similar baseline features, they also differ in ways that could significantly impact real-world use. Both offer 4 drive bays, dual M.2 NVMe slots, dual memory slots supporting up to 32 GB ECC DDR4 RAM, and nearly identical physical dimensions and cooling configurations. However, their distinct hardware differences become apparent when you look beyond these fundamentals. The DS925+ provides users with faster 2.5GbE LAN ports by default—doubling the network throughput capability compared to the DS923+’s 1GbE ports. This makes the DS925+ better suited to environments where higher network bandwidth is required, such as multi-user file sharing, large media transfers, or remote backups. Additionally, it features a more modern USB Type-C expansion interface and operates at a lower idle noise level, which may be important for those placing the NAS in noise-sensitive spaces like home offices or studios.
Meanwhile, the DS923+ offers a unique advantage in expandability, thanks to its PCIe Gen3 x2 slot, which allows for add-on network cards—something the DS925+ lacks. This modularity can be a decisive factor for users who want the flexibility to upgrade to 10GbE networking or other accessories in the future. The DS923+ also comes in slightly lighter and marginally more power-efficient under typical access and hibernation loads, which may appeal to users seeking a balance between performance and energy use. In the end, both models are capable and versatile NAS units, but their hardware differences point them toward different user priorities. The DS925+ favors users looking for built-in speed, quieter operation, and simplicity. In contrast, the DS923+ caters more to those who value customization, long-term expandability, and subtle improvements in efficiency. Matching these characteristics with your specific deployment goals will help determine which model is the better fit.
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AMD R1600 vs V1500B – CPU Specifications (Synology DS923+ vs DS925+)
At the heart of any NAS lies its processor, determining not only the system’s raw performance but also its ability to handle simultaneous tasks, support virtualization, process encryption, and manage demanding applications like video surveillance or hybrid cloud services. The Synology DS923+ and DS925+ are powered by two different AMD Embedded processors: the newer R1600 and the more robust V1500B, respectively. While both CPUs are built on AMD’s Zen architecture and support 64-bit processing, their configurations differ significantly in core count, threading, clock speed, and I/O bandwidth. The table below breaks down these differences in detail, followed by a practical look at how those specifications translate into performance across Synology’s DSM ecosystem.
Category | R1600 (DS923+)
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V1500B (DS925+)
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Advantage / Notes |
---|---|---|---|
Release Date | Q2 2019 | Q1 2018 | R1600 is newer |
Cores / Threads | 2 Cores / 4 Threads | 4 Cores / 8 Threads | V1500B offers more parallel processing |
Base / Boost Frequency | 2.6 / 3.1 GHz | 2.2 GHz | R1600 has faster clock speeds |
Architecture (Codename) | Zen (Banded Kestrel) | Zen (Great Horned Owl) | – |
Instruction Set | x86-64 + SSE4a, AVX2, FMA3 | x86-64 + SSE4a, AVX2, FMA3 | – |
Hyperthreading | Yes | Yes | – |
Overclocking | No | No | – |
TDP (PL1) | 18W (up to 25W) | 16W | R1600 allows more thermal headroom |
Tjunction Max | 105°C | 105°C | – |
L2 Cache | 1 MB | 2 MB | V1500B has more L2 cache |
L3 Cache | 4 MB | 4 MB | – |
Memory Support | DDR4-2400, ECC, Dual Channel, 32 GB Max | DDR4-2400, ECC, Dual Channel, 32 GB Max | – |
Max Memory Bandwidth | 38.4 GB/s | 38.4 GB/s | – |
PCIe Version / Lanes | PCIe 3.0 / 8 lanes | PCIe 3.0 / 16 lanes | V1500B has more connectivity bandwidth |
PCIe Bandwidth | 7.9 GB/s | 15.8 GB/s | V1500B supports double the PCIe throughput |
Manufacturing Node | 14nm | 14nm | – |
Chip Design | Chiplet | Chiplet | – |
Virtualization Support (AMD-V, SVM) | Yes | Yes | – |
AES-NI Support | Yes | Yes | – |
OS Support | Windows 10, Linux | Windows 10, Linux | – |
Benchmark | R1600 (DS923+) | V1500B (DS925+) | Advantage |
---|---|---|---|
Geekbench 6 (Single-Core) | 866 | 557 | R1600 is ~55% faster |
Geekbench 6 (Multi-Core) | 1345 | 1780 | V1500B is ~32% faster |
Geekbench 5 (Single-Core) | 802 | 601 | R1600 is ~33% faster |
Geekbench 5 (Multi-Core) | 1487 | 2254 | V1500B is ~52% faster |
PassMark (Estimated) | 2944 | 4184 | V1500B has ~42% higher multi-core score |
Average Single-Core | 100% | 70% | R1600 leads in per-core speed |
Average Multi-Core | 71% | 100% | V1500B leads in total throughput |
When we examine the CPU specifications in isolation, it’s clear that the V1500B in the DS925+ delivers greater multi-core throughput, while the R1600 in the DS923+ offers higher single-core clock speeds. But understanding how these numbers affect real-world tasks within Synology’s DiskStation Manager (DSM) is far more meaningful. Thanks to its 4-core, 8-thread configuration, the DS925+ excels in multi-threaded workloads, which is evident in its higher software limits. It supports up to 8 virtual machines and 8 virtual DSM instances through Virtual Machine Manager, making it ideal for users running containerized services, development environments, or isolated OS instances. Additionally, it handles more concurrent SMB connections (up to 40 with RAM expansion), supports up to 150 Synology Chat users, 80 Synology Drive users, and 80 Synology Office users—all reflecting its capacity to manage a larger user base and more simultaneous services without bottlenecks.
For surveillance and media workloads, the DS925+ also pulls ahead, matching the DS923+ in the number of supported camera channels (up to 40 cameras and 1200 FPS at 1080p H.265), but benefiting from more headroom when additional tasks are running in parallel—such as snapshots, backups, or AI-powered photo indexing via Synology Photos. Meanwhile, the DS923+, with its faster per-core performance and support for PCIe expansion, remains well-suited to users running lighter, more focused workloads or who plan to scale via hardware add-ons, such as a 10GbE network card. It still supports a respectable 4 VMs, 60 MailPlus users, and 50 users each for Synology Drive and Office, making it perfectly adequate for small teams or power users who prioritize customization and future expansion. While both CPUs are capable, the DS925+ delivers superior multi-user, multi-tasking performance, aligning closely with higher software thresholds and offering better out-of-the-box readiness for more demanding and concurrent applications across Synology’s DSM suite.
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R1600 (DS923+) excels in single-core performance (better for fast app responsiveness and lighter workloads).
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V1500B (DS925+) dominates in multi-core performance (better for multitasking, virtualization, and heavier parallel tasks).
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The V1500B also has more PCIe lanes (16 vs 8), which may benefit systems with more storage or networking needs.
Synology DS925+ vs DS923+ – Software Specifications
Beyond hardware, the real power of a NAS lies in what it enables users to do—and that’s where software specifications take center stage. Synology’s DSM (DiskStation Manager) operating system unlocks a vast suite of applications and services, from virtualization and backup to media streaming, file sharing, and surveillance. However, the scope and scale of these capabilities are directly influenced by the underlying system hardware and memory architecture. Let’s compare the software capabilities of the Synology DS925+ and DS923+, not just in terms of what each system can technically support, but how far each can be pushed in real-world use. We examine backup limits, virtual machine support, hybrid cloud services, user and group management, surveillance channel support, and more—offering a complete picture of each system’s software potential under DSM 7.2.
Category | DS925+
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DS923+
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Advantage / Notes |
---|---|---|---|
Max Single Volume Size | 200 TB (with 32 GB RAM) / 108 TB | 108 TB | DS925+ supports up to 200 TB with RAM upgrade |
Max Internal Volume Number | 32 | 64 | DS923+ allows more volumes |
M.2 SSD Storage Pool Support | Yes | Yes | – |
SSD Cache / TRIM | Yes / Yes | Yes / Yes | – |
Supported RAID Types | SHR, Basic, JBOD, RAID 0/1/5/6/10 | SHR, Basic, JBOD, RAID 0/1/5/6/10 | – |
RAID Migration Support | Yes | Yes | – |
Volume Expansion (Larger Drives / Add HDD) | Yes | Yes | – |
Global Hot Spare RAID Support | Yes | Yes | – |
Internal File Systems | Btrfs, ext4 | Btrfs, ext4 | – |
External File Systems | Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT | Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT | – |
File Protocols Supported | SMB, AFP, NFS, FTP, WebDAV, Rsync | SMB, AFP, NFS, FTP, WebDAV, Rsync | – |
Max SMB Connections (with RAM expansion) | 40 | 30 | DS925+ handles more concurrent connections |
Windows ACL & NFS Kerberos Auth | Yes | Yes | – |
Max Local Users / Groups / Shared Folders | 512 / 128 / 128 | 512 / 128 / 128 | – |
Max Shared Folder Sync Tasks | 8 | 4 | DS925+ supports double the sync tasks |
Max Hybrid Share Folders | 10 | 10 | – |
Hyper Backup (Folder & Full System) | Yes | Yes (DSM 7.2+) | – |
Synology High Availability | Yes | Yes | – |
Syslog Events per Second | 800 | 800 | – |
Virtualization Support (VMware, Citrix, etc.) | Yes | Yes | – |
Protocols (SMB, NFS, iSCSI, etc.) | Full Support | Full Support | – |
Supported Browsers | Chrome, Firefox, Edge, Safari | Chrome, Firefox, Edge, Safari | – |
Languages Supported | 24+ | 24+ | – |
Synology Chat – Max Users | 150 | 100 | DS925+ supports 50% more chat users |
Download Station – Max Tasks | 80 | 80 | – |
iSCSI Targets / LUNs | 2 / 2 | 2 / 2 | – |
MailPlus – Free Accounts / Max Users | 5 / 90 | 5 / 60 | DS925+ supports more users |
DLNA / Synology Photos (Facial & Object Rec.) | Yes | Yes | – |
Snapshot Replication – Max per Folder / System | 128 / 256 | 128 / 256 | – |
Surveillance Station (Default Licenses) | 2 | 2 | – |
Max IP Cameras (H.264 – 1080p) | 40 channels / 1050 FPS | 40 channels / 1050 FPS | – |
Max IP Cameras (H.265 – 1080p) | 40 channels / 1200 FPS | 40 channels / 1200 FPS | – |
Synology Drive – Max Users | 80 | 50 | DS925+ supports 60% more users |
Synology Drive – Max Files Hosted | 500,000 | 500,000 | – |
Synology Office – Max Users | 80 | 50 | DS925+ supports more office users |
Virtual Machine Manager – VM Instances / DSM Licenses | 8 / 8 (1 Free) | 4 / 4 (1 Free) | DS925+ supports 2× more virtual instances |
VPN Server – Max Connections | 8 | 4 | DS925+ supports 2× more connections |
While both the Synology DS925+ and DS923+ run the same robust DSM software and offer access to the full Synology ecosystem, their software ceilings differ significantly—reflecting the difference in overall system capability. The DS925+ consistently supports higher concurrent workloads across nearly every category. It enables up to 8 virtual machines, compared to just 4 on the DS923+, and supports double the Virtual DSM instances. It also allows for more Synology Chat users (150 vs 100), more Synology Office and Drive users (80 vs 50), and handles twice the VPN connections (8 vs 4). For collaborative environments, this means smoother performance when multiple users are accessing files, editing documents, or messaging in real time. It’s also more equipped for enterprise use with double the number of Shared Folder Sync tasks and higher MailPlus user capacity (90 vs 60 users), making it ideal for larger teams or more demanding deployment scenarios.
Meanwhile, the DS923+ still provides an impressive software suite, especially considering its smaller hardware footprint. It supports all major DSM features—Snapshot Replication, Hyper Backup, High Availability, Surveillance Station, and more—making it a solid choice for small businesses or power users who may not need the extended capacity but still want rich functionality. Its support for 10GbE upgrades via PCIe also allows for flexible scaling, even if its base configuration starts at a lower software threshold. The DS925+ is better suited for multi-user environments, heavier workloads, and broader deployment, while the DS923+ is ideal for lighter workflows, cost-sensitive setups, or users planning to grow into the system gradually. Understanding these software limitations and allowances is key to choosing the right NAS for your workload, user count, and future planning.
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The DS925+ outperforms the DS923+ in:
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Max volume size (up to 200 TB with RAM upgrade)
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SMB connections
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Shared folder sync tasks
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Synology Chat users
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MailPlus users
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Synology Drive & Office users
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Virtual machines and VPN connections
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The DS923+ has an edge only in volume count, supporting 64 internal volumes vs 32.
Synology DS925+ vs DS923+ NAS – Hard Drive and SSD Compatibility
As of this writing, Synology is taking a more restrictive stance on third-party drive support, especially with the introduction of its 2025 hardware series—including the DS925+. Since launching its own branded SSDs and HDDs in 2020–2021, Synology has steadily reduced the number of third-party drives listed as compatible with DSM. This trend escalated with DSM 7.1 in 2022, which introduced warning states for systems using unverified drives.
Although the impact of these warnings was later reduced, Synology has continued moving toward a locked-down storage ecosystem. The DS925+ marks a significant escalation. At launch, it only lists Synology-branded drives as compatible, and more critically, the system will not allow DSM initialization at all if unsupported drives are detected. This is a sharp departure from earlier practices where unverified drives merely triggered warnings post-setup. Despite sharing identical internal hardware with earlier NAS models from 2020 and 2023—which still support a wide range of drives from Seagate, WD, Toshiba, Samsung, and others—the DS925+ now enforces this compatibility policy at the firmware level.
In contrast, the DS923+ remains more flexible. While it will flag third-party drives as “unverified,” it still allows users to fully initialize the system, create storage pools, and access all DSM storage services without restriction. This flexibility makes the DS923+ a more appealing option for users who already own or prefer third-party HDDs and SSDs, particularly in regions where Synology’s own media is either overpriced or hard to source. Compounding the issue is the lack of clarity around Synology’s rollout. The policy was first disclosed on Synology’s German site and remains vaguely worded on the official DS925+ product page. There’s still no definitive answer on whether compatibility will expand to include major third-party brands—raising concern for system integrators, resellers, and first-time buyers.
If Synology’s goal is to ensure higher reliability through tighter integration, it should match that with transparent testing data, global pricing consistency, and readily available stock. In many regions, Synology drives are neither as accessible nor as competitively priced as third-party equivalents, which makes this policy feel restrictive rather than protective. While existing users can still migrate third-party drives from an older NAS into a DS925+, this is of little comfort to new buyers building from scratch. And the inconsistency with the DS923+—which continues to operate under the older, more open approach—only adds to user confusion. Synology appears to be transitioning toward a closed appliance model, where software, hardware, and media are tightly controlled. Whether this delivers long-term benefits or alienates a portion of its user base remains to be seen. For now, the DS925+ presents both a warning and a decision point for those evaluating their next NAS—especially if they rely on third-party drives.
Synology DS925+ vs DS923+ NAS – Which Should You Buy?
The DS923+ is a NAS system that, when first launched by Synology at the end of 2022, was met with mixed reactions. This was largely due to Synology shifting the system’s focus away from multimedia and GPU-accelerated tasks, and instead toward file processing and business-oriented deployments. Fast forward a few years, and the rest of Synology’s portfolio has realigned—bringing back more home and multimedia models—making this more utilitarian, file-centric 4-bay system easier for users to appreciate in context. That said, the DS925+ is the better choice in almost every way. It features a processor originally designed for higher-tier business-class systems, offering more cores, more threads, and greater performance potential across productivity tasks and multi-user workloads. Synology has also finally introduced 2.5GbE on this system—an overdue improvement that significantly enhances out-of-the-box network speeds compared to the 1GbE-only DS923+. As long as the DS925+ is priced within a reasonable 5% margin of the DS923+’s original launch price, it stands as the more capable system by default. However, it does come with a notable caveat: the lack of a 10GbE upgrade option. Unlike the DS923+, which includes a PCIe Gen3 x2 slot allowing for a future 10GbE NIC upgrade, the DS925+ is capped at its built-in 2.5GbE ports. While this still provides a theoretical 6Gbps of total bandwidth across both ports via link aggregation, it means there’s no room for expansion beyond that ceiling. This limitation becomes particularly relevant for users planning to fully populate the NAS with high-performance SATA SSDs or utilize M.2 SSD storage pools. In these cases, the network will eventually become a bottleneck—one that the DS923+ can avoid through its 10GbE upgrade path. Additionally, the DS923+ supports a wider range of third-party HDDs and SSDs, allowing greater flexibility and cost control, especially in regions where Synology-branded drives are less available or more expensive. The DS923+ will still let you initialize, create storage pools, and run DSM services using unverified third-party drives, unlike the DS925+, which now enforces stricter media validation at the OS level.
![]() Reasons to Buy the Synology DS923+ |
![]() Reasons to Buy the Synology DS925+ |
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In practical terms, the DS925+ is the stronger out-of-the-box choice, especially for users who value simplicity, improved default performance, and do not anticipate needing higher-than-2.5GbE networking down the line. However, the long-term value proposition becomes murkier when you factor in the DS923+’s PCIe expansion, broader drive compatibility, and the potential price drops that will follow its ageing status in Synology’s lineup. In short, the DS925+ is the better NAS on day one—more powerful, faster, and quieter. But if you’re planning for day 1,000, it’s worth pausing to consider whether the expandability and media flexibility of the DS923+ may be a better fit for your storage and networking needs over the next five to seven years.
Synology DS925+ NAS |
![]() Synology DS923+ NAS |
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Check Amazon in Your Region for the Synology DS925+ NAS |
Check B&H for the Synology DS925+ NAS |
Check Amazon in Your Region for the Synology DS923+ NAS |
Check B&H for the Synology DS923+ NAS |


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