The Topton N305 NAS Motherboard+CPU Combo – Should You Buy It?

If you have come to this article on the Topton N305 NAS Motherboard, then chances are you are a very specific kind of NAS user! When you want to build your own NAS from scratch, there is always the balance between POWER and POWER EFFICIENCY! The former, means you can get so much more done, as quickly as possible – the latter is a pursuit to ensure that this 24×7 DiY NAS server is not going to cost you a small fortune in electricity costs! Until recently, the 2020/2021 released Topton N5105/N6005 NAS+Mobo combo was considered the best balance in the market to provide a fair balance of performance, capability and power efficiency. However, because Intel has moved forward with its refresh of their processors into the newer generation (largely killing off the Intel Celeron and Pentium naming) AND brands such as Topton have now vastly improved their development techniques, many MANY eyes have now moved over to the newer Topton Intel N305 and N100 NAS Motherboard. Most ‘Build Your Own’ (BYO) NAS buyers are considering this highly praised little M-ITX combo for their new Plex Build, their new modest Container/VM server with Proxmox, or scaling up from a private cloud to a 5-6 drive UnRAID or TrueNAS server! But, is the N305 NAS motherboard actually any good? What are the main differences to consider between the N305 and N100 model? And is it reliable enough for your data? In this article we dig into the hardware and share what we find!

Note – You can watch the Topton N305 full hardware review and dive HERE on YouTube

Additionally, find our lists of the recommended NAS CPU+Mobo Combos HERE on NASCompares in a dedicated article

Where to Buy (Amazon / Aliexpress)	ALIEXPRESS $279 HERE (Upgrades Available) Amazon $348 HERE (Board Only)
Component	Specification
Processor	Intel Alder Lake-N i3-N305
Memory	1x SO-DIMM DDR5 4800MHz, up to 16/32GB
Storage	2x M.2 NVMe 3×1 Slot, 2x SATA3
PCIe Slot	PCIe 3×1 (cut)
Graphics	Intel UHD Graphics
Display Outputs	2x HDMI, 1x DP, 1x Type-C (all 4096 x 2160@60Hz)
Network Card	4x Intel i226-V 2.5G
4G LTE/SIM	Yes
Wireless?	MICROPCIe Slot (Shared with PCIe 3×1 Slot)
USB Ports	5x USB2.0, 1x USB3 via FPanel and Pins
Cooling	Passive cooling with fanless heatsink
BIOS	AMI EFI BIOS with various supports
TDP	9-15W
Power Input	DC 12V (External PSU option)
Case Material	Aluminium Alloy
Expansion	PWM fan power connector, TPM Pin
Dimensions	158.0mm x 126.5mm x 60.2mm
Color	Black or Gray (random)
Installation	Desktop, Wall-mounted
Operating Environment	0°C to 70°C, 5%-85% Humidity

 

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Topton N305 DiY NAS CPU+MoBo Combo – Hardware Design

The Topton N305 Board is offered on Aliexpress with various pricing options based on the included components. The basic package, which includes just the CPU and motherboard, is priced at $319. For an additional $10, customers can obtain the package with a SAS fan-out cable for enhanced storage capabilities, totalling $329. The most comprehensive option includes everything mentioned plus an external PSU, available for $359. This tiered pricing structure provides flexibility for buyers based on their specific needs and desired configurations.

The latest version of the Topton N305 ITX motherboard now includes a metal, high quality fan-assisted heatsink. This new feature aims to enhance cooling efficiency for the system. It’s a significant update for those looking for improved thermal management in their ITX setups.

The N305 CPU, a central component of Topton’s latest NAS and DiY switch motherboard, showcases Intel’s innovative engineering through its Alder Lake-N architecture, catering specifically to efficiency and performance. With its Intel 7 lithography, the processor strikes a balance between power consumption and computational prowess, offering a TDP of 9-15W. This optimization allows for reduced energy usage while maintaining high performance, making it an ideal choice for NAS systems where efficiency is paramount.

Embedded within the motherboard, the N305 CPU supports advanced memory capabilities, including DDR5, ensuring broad compatibility and future-proofing for evolving storage technologies. The processor’s ability to handle up to 16GB of memory alongside its versatile support for various memory speeds up to 4800 MHz underlines its capacity to manage intensive data transactions and storage operations. This flexibility is crucial for NAS applications, which demand rapid access to and processing of voluminous data sets.

Furthermore, the integration of Intel UHD Graphics within the CPU provides substantial support for multimedia tasks, extending the motherboard’s utility beyond mere storage. This feature, coupled with the processor’s support for multiple displays and high-definition outputs, enables the N305 NAS Motherboard to serve as a central hub for not only storage but also media streaming and light graphical tasks. The inclusion of advanced technologies like Intel Quick Sync Video highlights the CPU’s adeptness at encoding and decoding video streams efficiently, thereby enhancing the functionality of NAS systems built with the N305 motherboard for a variety of applications.

The Topton N305 NAS Motherboard incorporates a single SO-DIMM slot for memory, strategically located on the motherboard’s rear, optimizing space and accessibility. This design choice underscores the board’s compact and efficient layout, catering to users seeking a balance between performance and form factor in their NAS solutions. However, it’s important to note that this system does not support ECC (Error-Correcting Code) memory. The absence of ECC support is typical for systems prioritizing cost-effectiveness and simplicity over the error correction capabilities critical in enterprise-level servers. Despite this, the motherboard’s memory compatibility, supporting up to 32GB of DDR5 RAM at speeds of 4800MHz (and compatibility with 5200/5600MHz), ensures robust performance for various NAS applications.

At the top section of the Mini-ITX NAS motherboard, there are two distinct SATA connection ports available for direct drive connections. Additionally, it features an SFF-8643 output. This output enables the connection of four more SATA drives. The connectivity expansion is facilitated through a compatible cable.

The motherboard utilizes a JMB585 controller for enhanced SATA drive management, bridging the gap between PCIe hosts and SATA/AHCI storage devices. This integration allows the board to support five SATA ports through the JMB585, enhancing its storage capabilities.

The controller also enables Port Multiplier support, significantly expanding potential storage configurations. This setup is particularly beneficial for users looking to maximize their storage options, offering a versatile solution for a variety of storage needs.

Example:

It supports command-based switching (CBS) and FIS (Frame Information Structure)-based switching (FBS). JMB585 also support TRIM to the SSD and can transmit and receive data by both of AHCI mode and legacy IDE mode to and from the host respectively.

Although this review is of the DC output version of the Topton N305 NAS board, there is also two 4-POWER (12V) connectors at the rear corner of the motherboard to supply additional power for bulk storage needs as required in some enclosures and backplanes.

This review focuses on the DC output variant of the Topton N305 NAS motherboard. Additionally, it features two 4-POWER (12V) connectors located at the rear corner. These connectors are designed to supply extra power for extensive storage needs. This capability is especially useful in certain enclosures and backplanes where additional power is necessary for bulk storage management.

The Topton N305 DC motherboard is supplied with an external power supply unit (PSU), specifically a 180W model produced by Chicony, a name that may not be familiar to all. No, me neither…

The fan-assisted CPU cooling system on the Topton N305 NAS motherboard receives commendation for its efficiency, producing minimal noise while maintaining a surprisingly low profile. This design choice enhances the overall user experience by ensuring effective thermal management without adding bulk or disruptive sound to the setup.

The N305 NAS motherboard facilitates M.2 NVMe storage through two 2280 slots. These slots are strategically located on the rear or base of the motherboard for easy access and efficient space utilization. This configuration allows for high-speed storage solutions to be incorporated seamlessly into the system, enhancing its performance capabilities.

The M.2 connectors on the N305 NAS motherboard are specified as PCIe Gen 3×1, providing a maximum bandwidth of 1000MB/s for each slot. While it may be seen as a drawback that 3×4 NVMe drives will operate in these 3×1 slots, limiting their maximum speed, this configuration remains noteworthy. Considering the motherboard’s compact scale and the overall allocation of 9 PCIe lanes, the inclusion of these connectors and their performance capability is still an impressive feat, balancing system expansion with available resources.

Our examination through SSH terminal within UnRAID has verified the configuration of the slots. It’s confirmed that they operate at the downgraded bandwidth of 3×1. This adjustment aligns with the system’s specifications and ensures compatibility within its infrastructure.

During our disk speed tests on the motherboard, a standard PCIe 3×4 NVMe drive was tested using a 1GB file. The results showed a sequential read/write speed of approximately 750-780MB/s. This performance is indicative of the operational bandwidth limits imposed by the 3×1 slot configuration on the motherboard.

In our tests transferring data between two M.2 NVMe drives with a 1GB file, the speeds achieved ranged from 320-330MB/s. This suggests that the two NVMe slots share a single lane or path on the motherboard. The shared pathway is likely the reason for these specific transfer speeds, indicating a bottleneck at the shared connection point.

Located at the front-bottom of the motherboard is a PCIe slot, specifically designed for further system enhancements and expansions. This slot opens up opportunities for additional upgrades, allowing users to customize their setups according to their specific needs. It represents a key feature for those looking to extend the motherboard’s capabilities beyond its initial configuration.

The PCIe slot on the motherboard operates with Gen 3×1 specifications, offering a maximum bandwidth of 1,000MB/s. Despite this limitation, it has been physically designed to accommodate longer cards, such as x4, x8, or x16. This thoughtful design ensures compatibility with a wider range of expansion cards, providing users with greater flexibility in upgrading their systems. It is something of a compromise between bandwidth capability and physical compatibility, enhancing the motherboard’s adaptability for various use cases. The limitations in PCIe speed and lane allocation on the motherboard stem from the CPU’s architecture, which provides 8-9 lanes. This constraint not only affects the N305 model but also has implications for the N100 version of the motherboard and CPU NAS combo. The lane count directly influences the number and types of devices that can be supported concurrently, impacting overall system expandability and performance. This highlights the importance of the CPU’s lane capacity in determining the motherboard’s capability for expansions and upgrades.

Located on the back of the motherboard is a MINIPCIe slot, primarily intended for adding a wireless network card. This slot, while versatile, is not suitable for a wide range of other expansions. Its inclusion provides an option for wireless connectivity, enhancing the board’s functionality without significantly diversifying its expansion capabilities. The MINIPCIe slot located at the rear of the motherboard is shared with the main PCIe 3×1 slot, meaning they cannot be used simultaneously. This configuration limits the ability to expand the system’s connectivity and upgrade capabilities at the same time. Users must choose between utilizing the MINIPCIe slot for wireless networking or the PCIe slot for other expansions, highlighting a trade-off in the motherboard’s design for flexibility versus functionality.

In an interesting move, likely catering to prosumer uses like pfsense and OpenWRT builds, the motherboard includes a 4G LTE/SIM card slot. This addition is somewhat unexpected but expands the board’s utility by enabling direct cellular network access. It suggests a broader vision for the motherboard’s applications, potentially appealing to users requiring remote or backup internet connectivity. Integrating the 4G LTE/SIM card slot for cellular network access into NAS systems like UnRAID may present challenges, as such operating systems might not support this type of cellular network interface. This limitation underscores the importance of verifying compatibility with the intended NAS OS to ensure full functionality of the onboard features. The presence of cellular connectivity options expands the potential use cases for the motherboard, although users must navigate the constraints of OS support.

The motherboard is equipped with four 2.5GbE network ports, each powered by an Intel i226-V controller. This setup significantly enhances the board’s networking capabilities, providing robust, high-speed connections suitable for demanding network environments. The inclusion of multiple 2.5GbE ports allows for flexible network configurations and supports advanced networking features, making it an ideal choice for users looking for high-performance networking options in their NAS setups. The integrated network card on the motherboard enables it to achieve a default network bandwidth of over 1GB per second. This high capacity can be distributed across multiple client devices or utilized fully by a single device through advanced networking techniques such as SMB3, load balancing, LAG, or trunking with a compatible smart switch.

This feature significantly enhances the motherboard’s network performance, catering to both distributed and concentrated network demands. Integrating a 10GbE NIC upgrade into the motherboard’s PCIe 3×1 slot could potentially elevate the network bandwidth to 2GB or 2000MB/s. This enhancement would leverage the available PCIe slot to significantly boost the networking capabilities of the system. Such an upgrade indicates a strong potential for achieving superior network performance, making the system well-suited for high-demand networking tasks. The performance ceiling for the two NVMe drives on the motherboard, even when configured in RAID 0/1, is around 1000MB/s. Meanwhile, connecting 5-6 SATA drives, depending on whether they are HDDs or SATA SSDs, can result in varying performance. With HDDs, expect around 600-800MB/s, and with SATA SSDs, performance can reach up to 1000-1100MB/s. This variation is due to the JMB585 SATA controller operating on a Gen 3 lane, influencing the overall throughput of connected storage devices.

The motherboard is designed with an abundance of USB ports, catering to various connectivity needs. Among these, two ports are uniquely positioned internally, providing a convenient option for connecting an OS boot drive directly on the motherboard. This feature enhances the flexibility and functionality of the system, allowing for streamlined setup and efficient use of space.

The motherboard features six USB 2.0 ports in total, with four positioned on the rear and two internally on the board, designed for versatile connectivity options, including the possibility of an OS boot drive connection. Additionally, it supports USB 3.2 connectivity through front panel and internal pins, expanding its compatibility with faster USB devices.

The motherboard is equipped with HDMI 2.0 and DisplayPort 1.4 outputs, supporting 4K resolution at 60FPS. This capability ensures high-quality video output for tasks requiring detailed visuals. Such features make the board suitable for applications beyond traditional computing tasks, including media playback and content creation that demands high-resolution displays.

We conducted a video analysis of the Topton N305 NAS Motherboard+CPU combo, exploring its BIOS features and conducting various tests using UnRAID. This in-depth examination aimed to understand the motherboard’s capabilities, performance, and how it handles in different scenarios, particularly focusing on its compatibility and performance with UnRAID as a potential NAS solution. This process provided valuable insights into its suitability for various computing tasks and its overall performance metrics.

The Topton N305 NAS Motherboard+CPU Combo – Should You Buy It?

As of 2024, the Topton N305 NAS motherboard stands out for its balance between power efficiency and functionality, especially at its price range. Its CPU, with a flexible TDP ranging from 9 to 15 watts, impressively manages to offer an 8-core, 8-thread configuration capable of reaching up to 3.8 GHz per core. This makes it an excellent choice for tasks like 4K transcoding on a Plex Media Server, with the potential to handle 8K content thanks to its integrated graphics hitting 1.25 GHz. Despite the limitation of having only 9 PCIe Gen 3 lanes, the design efficiently allocates these resources, supporting up to six SATA drives, two M.2 slots, and a PCIe expansion slot, all on a compact MITX board. While the N100 version presents a more cost-effective and slightly less powerful alternative, the modest increase in power consumption of the N305 variant justifies its higher performance capability, making it a superior choice for those needing a more potent setup. The N305’s design, which mirrors the physical and lane layout of the N100 while significantly enhancing performance, demonstrates an impressive achievement in maximizing the utility and efficiency of a small form factor motherboard.

Where to Buy (Amazon / Aliexpress)	ALIEXPRESS $279 HERE (Upgrades Available) Amazon $348 HERE (Board Only)
Component	Specification
Processor	Intel Alder Lake-N i3-N305
Memory	1x SO-DIMM DDR5 4800MHz, up to 16/32GB
Storage	2x M.2 NVMe 3×1 Slot, 2x SATA3
PCIe Slot	PCIe 3×1 (cut)
Graphics	Intel UHD Graphics
Display Outputs	2x HDMI, 1x DP, 1x Type-C (all 4096 x 2160@60Hz)
Network Card	4x Intel i226-V 2.5G
4G LTE/SIM	Yes
Wireless?	MICROPCIe Slot (Shared with PCIe 3×1 Slot)
USB Ports	5x USB2.0, 1x USB3 via FPanel and Pins
Cooling	Passive cooling with fanless heatsink
BIOS	AMI EFI BIOS with various supports
TDP	9-15W
Power Input	DC 12V (External PSU option)
Case Material	Aluminium Alloy
Expansion	PWM fan power connector, TPM Pin
Dimensions	158.0mm x 126.5mm x 60.2mm
Color	Black or Gray (random)
Installation	Desktop, Wall-mounted
Operating Environment	0°C to 70°C, 5%-85% Humidity

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