Is the CWWK N355 Soft Router Firewall / NAS Box Worth Your Data? (Review)

DIY router boxes have gained popularity in recent years, especially those coming out of China with various hardware configurations. The CWWK N355-powered firewall appliance is an intriguing option, not just as a high-performance router but also as a potential NAS device. Unlike many reviews that focus on its networking capabilities, this review explores its viability as a compact and efficient NAS solution.

CWWK N355 DIY 10GbE Router/NAS Review – Quick Conclusion

The CWWK N355 is a well-rounded and versatile device that excels in networking, virtualization, and compact NAS applications, thanks to its dual 10GbE SFP+ ports, 2.5GbE LAN, expandable DDR5 RAM, and M.2 NVMe storage support. It is a compelling choice for firewall applications, Proxmox virtualization, and even lightweight NAS or media server setups, offering a balance of performance and connectivity in a compact and durable metal chassis with active cooling. The Alder Lake-N N355 CPU delivers efficient multi-core performance, making it suitable for running multiple services, including Docker containers, VMs, and network security applications. Additionally, its expandable memory and storage options give users flexibility, though its storage implementation is somewhat restrictive due to only one native NVMe slot and a SATA port with no internal mounting space. However, its aging Intel 82599ES 10GbE controller, high idle power consumption of 21-22W, and lack of full-speed PCIe lanes limit its potential for high-performance NAS deployments. While it can handle moderate file-sharing and media streaming workloads, users who require full 10GbE speeds, extensive storage expansion, and power efficiency may find better options in dedicated NAS motherboards with PCIe slots or higher-efficiency processors. Still, for those looking for a compact, high-speed network appliance with strong customization potential, the CWWK N355 remains a solid choice for advanced home labs, small business networking, and hybrid router-NAS setups. As long as users are aware of its networking bottlenecks and storage limitations, it offers impressive versatility and performance at an attractive price point.

BUILD QUALITY - 8/10

HARDWARE - 8/10

PERFORMANCE - 7/10

PRICE - 10/10

VALUE - 10/10

8.6

PROS

High-Speed Networking: Equipped with dual 10GbE SFP+ ports and two 2.5GbE LAN ports, providing excellent connectivity for advanced networking setups.
Expandable Storage: Features two M.2 NVMe slots (one requiring an adapter) and a SATA 3.0 port, allowing for versatile storage configurations.
Efficient Alder Lake-N CPU: The Intel N355 (8C/8T, up to 3.8GHz) offers efficient performance for firewall applications, Proxmox, lightweight NAS, and media servers.
DDR5 Memory Support: Supports up to 48GB DDR5 RAM, enabling smooth multitasking, virtualization, and Docker/containerized environments.
Robust Build and Cooling: Full aluminum chassis acts as a heat sink, with a top-mounted active cooling fan for effective thermal management.
Wide OS Compatibility: Works with Windows 11 Pro, Linux distributions, ESXi, OPNsense, pfSense, OpenWrt, and TrueNAS, making it highly flexible.
Compact and Power-Efficient: Small form factor and 15W TDP CPU make it space-saving and relatively low-power compared to traditional rack-mounted alternatives.

CONS

Aging 10GbE Controller: The Intel 82599ES 10GbE chipset is outdated, limiting maximum network speeds and performance efficiency in high-bandwidth workloads.
Limited SATA Storage Options: While it includes a SATA 3.0 port, there is no internal mounting space for a 2.5-inch drive, requiring external solutions.
Higher Idle Power Draw: Consumes 21-22W at idle, which is higher than dedicated NAS devices, potentially affecting long-term energy costs.

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The CWWK N355 features a robust industrial design, with an all-metal chassis that acts as a heat sink, efficiently dissipating heat from critical components. The exterior is entirely metal, including the base panel, which features mesh ventilation to enhance airflow. A top-mounted active cooling fan ensures consistent airflow across the CPU and networking components, preventing thermal throttling under sustained workloads.

Internally, copper heat plates are placed over the CPU and 10GbE controllers, allowing for direct heat transfer to the chassis. This cooling system is highly effective, maintaining temperatures within safe limits even under heavy network and storage loads. During testing, the device remained at an average of 50-55°C under full load, with the fan producing minimal noise.

The cooling implementation makes the CWWK N355 a viable option for extended use in high-performance NAS, virtualization, or firewall applications where thermal efficiency is crucial. Given its mix of powerful networking features, ample connectivity, and storage options, this device has the potential to serve a broader range of applications than just routing. However, evaluating its strengths and weaknesses is crucial before repurposing it for a NAS setup.

One of the standout features of the CWWK N355 is its impressive network connectivity. Equipped with dual 10GbE SFP+ ports and two 2.5GbE i226V LAN ports, it offers significantly more bandwidth than traditional consumer NAS devices.

These high-speed connections enable rapid file transfers, efficient virtualization networking, and multi-user simultaneous access without bottlenecks.

It also includes two M.2 NVMe slots and a SATA 3.0 port, making it highly flexible for storage configurations. This means users can integrate fast NVMe storage while still having the option to include traditional SATA drives for cost-effective capacity expansion.

The aluminum chassis with active cooling enhances its thermal efficiency, ensuring stable operation even under load, a crucial aspect for maintaining performance in continuous 24/7 operation.

The N355 CPU, an Alder Lake-N processor, brings 8 cores and 8 threads, with a base clock of 1.8GHz and a boost up to 3.8GHz. This processor is designed for efficiency while maintaining a respectable level of performance for various workloads.

It also features integrated Intel UHD graphics, which allows it to handle lightweight GPU tasks such as video decoding, remote desktop applications, and low-power graphical processing.

The DDR5 SO-DIMM slot supports up to 48GB RAM, although some listings mention 32GB as the maximum. This expanded memory capacity is particularly beneficial for virtualization, allowing users to run multiple lightweight VMs, containers, and even a Plex media server with modest hardware-accelerated transcoding capabilities.

The combination of efficient CPU performance and expandable RAM makes it versatile, but users should be aware of its limitations when handling resource-intensive applications.

However, storage expansion comes with some challenges. While the device technically supports two M.2 NVMe drives, only one slot is a standard 2280 interface. The second slot requires an adapter, which is included, but adds complexity to installation. This additional requirement may be a concern for users who are less experienced with hardware modifications or prefer simpler plug-and-play configurations.

The SATA drive support is somewhat limited—while the port is available, there is no dedicated internal space for mounting a 2.5-inch drive inside the enclosure, meaning external mounting is necessary. This lack of internal SATA mounting may be a dealbreaker for those who prefer a more integrated and clutter-free build. While external enclosures or adapters could be used to house SATA drives, it introduces additional complexity and potential cable management issues.

Power consumption is another area of concern. Under idle conditions, the device draws 21-22W, which is quite high compared to traditional NAS appliances. Many consumer NAS systems are designed to run efficiently at around 10W to 15W when idle, making this unit significantly more power-hungry when not under load.

Under load, with 10GbE connections active, VMs running, and storage drives in use, power consumption reaches 36W. While this is still within reasonable limits for a device offering high-speed networking and multi-core processing, it is something to consider for users prioritizing energy efficiency. Over time, the additional power draw may add up, especially for those running multiple devices in a home or small business setup. If power efficiency is a critical factor, other lower-power options might be preferable.

Performance-wise, the M.2 NVMe drives achieve read speeds of up to 720MB/s and write speeds of 690MB/s.

While SATA performance peaks at around 200MB/s with a standard HDD. These speeds are respectable but fall short of fully utilizing the available 10GbE networking potential.

While this is acceptable for most home NAS applications, the 82599ES 10GbE controller is a notable bottleneck. It is an older PCIe Gen2 x4-based controller (in this deployment at least), which limits full 10GbE speeds.

In testing, even with dual 10GbE connections active, network transfers maxed out at around 600-700Mbps per link, rather than saturating the full 10GbE bandwidth on each of them.

This suggests that while it is capable of handling high-speed transfers, it is not the ideal choice for users who need to maximize 10GbE connectivity for large-scale data transfers or enterprise workloads.

While the CWWK N355 offers excellent networking and processing power, its relatively aging 10GbE controller, high idle power consumption, and limited internal storage space make it less ideal for an all-purpose NAS. However, it excels as a high-performance firewall/router, Proxmox host, or Plex server for users who can work around these limitations.

Users interested in setting up an advanced home lab or small business server might find this device appealing due to its networking flexibility, processing capability, and virtualization potential. While it lacks native software optimization found in dedicated NAS brands, those comfortable with manual setup and open-source NAS software will find it a capable and adaptable device.

For those seeking a dedicated NAS solution with full 10GbE performance, an ITX motherboard with PCIe 3.0 slots and dedicated storage expansion might be a better alternative. Such options would provide greater flexibility for storage expansion, more efficient networking solutions, and overall better optimization for NAS workloads. But if you’re looking for a compact, all-in-one networking and storage device, the CWWK N355 is an impressive contender.

Just be mindful of the legacy components and potential bottlenecks before making your final decision. With the right configuration and expectations, it can serve as a cost-effective and powerful addition to a home lab or small business network setup.

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CWWK N355 DIY NAS Motherboard Review

The CWWK N355 DIY NAS motherboard is a Mini-ITX board designed for users looking to build a compact yet powerful NAS system with high storage capacity and expansion potential. Featuring the Intel Twin Lake N355 processor, dual 2.5GbE networking, six SATA ports, and two NVMe slots, it balances performance and affordability. With PCIe 3.0 expansion and a power-efficient CPU, it provides a solid foundation for home lab enthusiasts and small-scale NAS builders. However, it does come with some limitations, particularly in PCIe lane allocation and component placement. This review covers design, hardware, storage, performance tests, and overall value to determine whether it’s the right choice for your next DIY NAS project.

Available in two configurations, the N150 quad-core version ($174) and the N355 octa-core version ($288), this motherboard positions itself as a budget-friendly but capable alternative to more expensive NAS solutions. While the onboard features are generous for the price, the placement of components and some design choices might limit expandability for certain users. Let’s dive deeper.

CWWK N355 NAS Review – Quick Conclusion

The CWWK N355 DIY NAS motherboard provides a solid balance between affordability and performance, making it a strong option for NAS builders and home lab users. With six SATA ports and two NVMe slots, it offers flexible storage options, while dual 2.5GbE networking ensures decent network speeds. The PCIe 3.0 x4 slot allows for expansion, but lane allocation limitations could be a bottleneck for certain configurations. Power efficiency is excellent, and during testing, the N355 CPU handled multiple VMs, media streaming, and general NAS tasks well. However, thermal management and component placement could have been better, particularly around the PCIe and SATA ports.

Overall, the CWWK N355 is a capable Mini-ITX NAS motherboard, especially for those comfortable with DIY setups. The lack of ECC memory support, PCIe lane sharing, and close component placement are drawbacks, but for the price, it remains a versatile and well-featured board.

BUILD QUALITY - 9/10

HARDWARE - 9/10

PERFORMANCE - 8/10

PRICE - 9/10

VALUE - 9/10

8.8

PROS

Compact Mini-ITX design, ideal for NAS builds
Dual 2.5GbE ports for enhanced network performance
Six SATA ports for ample storage expandability
Two NVMe slots for high-speed SSD caching or storage
Energy-efficient Intel N355 CPU with low power draw
Good virtualization support for lightweight VMs and containers
Strong media streaming performance, including Plex compatibility
Affordable price point compared to similar NAS motherboards

CONS

PCIe slot placement may block SATA ports with larger cards
Limited PCIe lanes constrain high-speed expansion options
No ECC memory support, which may be a concern for some user

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CWWK N355 NAS Review – Design

The CWWK N355 DIY NAS motherboard follows a compact Mini-ITX design, offering a good mix of functionality and space efficiency. Its 10-layer high-density PCB provides durability, while the standard ATX 24-pin power and 4-pin CPU power connectors make it easy to integrate into various NAS chassis. The purple PCB aesthetic is unique, setting it apart from many other DIY NAS motherboards. However, despite its compact build, some of the design choices create challenges when it comes to expandability.

One of the most noticeable issues is the placement of the PCIe 3.0 x4 slot in relation to the SATA ports. While the board allows for expansion cards like RAID controllers or 10GbE adapters, the proximity of the PCIe slot to the six SATA ports means that larger cards can obstruct some of the SATA connections.

This could force users to choose between additional network connectivity and full SATA drive support, which is an unfortunate trade-off. Ideally, an SFF-8087 or OCuLink alternative for SATA connectivity would have been a better approach, reducing port congestion.

The built-in cooling options are fairly basic, with a single CPU fan header and two system fan headers (only one supporting PWM). While the board is designed for low-power efficiency, adding high-performance storage or running multiple VMs may generate additional heat that requires better cooling.

The included stock CPU cooler is not ideal, as it sits too close to nearby components, making it harder to install without interfering with the SO-DIMM DDR5 memory slot. Users are advised to invest in a third-party low-profile cooler for better thermal management.

On the connectivity side, dual 2.5GbE network ports (Intel i226V) provide solid networking performance for most NAS use cases, with support for SMB Multichannel and link aggregation. The limited USB selection, however, could be a concern.

With only one USB 3.0 port and three USB 2.0 ports, users relying on external storage or bootable USB setups may find the available connections restrictive. That said, the internal USB 3.0 and USB 2.0 headers provide some additional flexibility for internal USB-based boot drives, but a few more rear-facing USB ports would have been welcome.

CWWK N355 NAS Review – Storage

Storage is a key strength of the CWWK N355 motherboard, with a combination of six SATA3 ports and two M.2 NVMe slots offering flexibility for different storage configurations. The ASM1166 SATA controller is responsible for managing the six SATA ports, providing stable performance for hard drives and SSDs. Users looking to build a NAS with high-capacity drives will appreciate the dedicated SATA expansion, which supports RAID configurations through software.

The two M.2 NVMe slots, while a welcome addition, are limited to PCIe 3.0 x1 speeds, meaning they can only reach maximum sequential throughput of around 780-800MB/s. This is a clear limitation compared to PCIe 3.0 x4 NVMe slots found in higher-end boards. However, these slots are still useful for caching or fast-access storage, especially when paired with SATA drives for bulk data storage.

During testing, a RAID 0 setup with six 4TB HDDs achieved 650MB/s sustained throughput, showing that the ASM1166 controller handles multiple drives efficiently. Performance with SATA SSDs was better, with speeds saturating the SATA3 interface at 550-560MB/s per drive. Users expecting enterprise-level speeds may find this limiting, but for general NAS applications, it performs well.

Another consideration is PCIe lane allocation. Because the ASM1166 controller operates on a PCIe 3.0 x1 interface, total throughput is shared across all six SATA ports. This means that in heavy read/write operations across multiple drives, users might encounter bottlenecks. Those planning on maximizing SATA performance should ensure efficient data distribution across drives.

Ultimately, while the storage configuration is flexible and functional, the PCIe 3.0 x1 restrictions on both NVMe and SATA controllers present some limitations. For users needing high-speed NVMe storage, a motherboard with PCIe 3.0 x4 support per NVMe slot would be preferable, but for most NAS applications, the N355 provides good storage expandability at a reasonable price.

Interestingly, when I rand 100x 1GB File tests via terminal on each of the Gen 3×1 m.2 NVMe, the numbers were pretty good (factoring in the efficient class CPU and 1 lane of Gen 3 – so was never gonna exceed 800-900MB/s anyway).

Afterwards, I wanted to check if the PCIe slot was sharing lane space with the 2nd m.2 slot (as is the case on some of the N100/N305 NAS Moos before) and I am pleased to confirm that I was able to use terminal and 100x 1GB Read on both the 2nd M.2 NVMe slot AND another m.2 NVMe on a PCIe Card mounted on via the PCIe 3×4 slot.

So I am quite happy with the data/internal bandwidth in these tests with such a modest CPU. Let’s discuss this internal hardware and performance more.

CWWK N355 NAS Review – Tests & Performance

The Intel N355 CPU offers efficient performance for NAS-related tasks, including file sharing, virtualization, and media streaming. During testing, it handled multiple VMs running concurrently, with each assigned a virtual CPU and minimal RAM. Even under load, the CPU maintained stable performance without excessive heat generation, making it suitable for users who need a lightweight but capable processing unit for home lab applications.

Network performance was another highlight, with the dual 2.5GbE interfaces providing a combined throughput of up to 550MB/s in link aggregation mode. Real-world file transfers over SMB showed consistent multi-gigabit speeds, demonstrating the board’s ability to handle data-heavy operations effectively. However, users aiming for 10GbE connectivity will need to rely on the PCIe slot, which introduces some trade-offs in terms of expansion options.

In media applications, the N355 CPU managed simultaneous 1080p and 4K Plex streams, with CPU usage remaining under 60% during software transcoding. Native playback and direct-streaming performed significantly better, with no noticeable impact on system resources. While the board lacks dedicated hardware transcoding support, it remains a viable option for users relying on direct-play workflows.

Power efficiency remained a strong suit, with idle power consumption measuring around 9-10W with SSDs installed, increasing to 30-40W under load with multiple drives and VMs active. The low TDP ensures minimal heat output, but active cooling is still recommended for prolonged high workloads. Overall, performance results confirm that this board is well-optimized for NAS duties, though users with high-end processing needs may require a more powerful solution.

CWWK N355 NAS MITX Board Review – Verdict & Conclusion

The CWWK N355 DIY NAS motherboard is an excellent choice for those seeking an affordable and feature-rich Mini-ITX solution for NAS applications. Its combination of dual 2.5GbE networking, six SATA ports, and two NVMe slots offers a strong foundation for storage and high-speed connectivity. Performance-wise, the N355 CPU handles virtualization and media streaming well, maintaining a low power draw while running multiple tasks efficiently. However, the limited PCIe lane allocation can restrict certain use cases, particularly when adding high-performance storage or networking upgrades. Despite these constraints, this motherboard delivers solid performance for users prioritizing a cost-effective and power-efficient NAS setup.

That being said, users should carefully consider their expansion needs before purchasing, as PCIe slot placement and bandwidth limitations may impact future upgrades. Additionally, the lack of ECC memory support may be a concern for enterprise-level deployments, though most home users and small-scale NAS setups will not be significantly affected. Ultimately, the CWWK N355 stands out as a capable and versatile board, offering good performance, reasonable expandability, and excellent value for money.

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This description contains links to Amazon. These links will take you to some of the products mentioned in today's content. As an Amazon Associate, I earn from qualifying purchases. Visit the NASCompares Deal Finder to find the best place to buy this device in your region, based on Service, Support and Reputation - Just Search for your NAS Drive in the Box Below

Need Advice on Data Storage from an Expert?

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If you like this service, please consider supporting us. We use affiliate links on the blog allowing NAScompares information and advice service to be free of charge to you.Anything you purchase on the day you click on our links will generate a small commission which isused to run the website. Here is a link for Amazon and B&H.You can also get me a Ko-fi or old school Paypal. Thanks!To find out more about how to support this advice service check HEREIf you need to fix or configure a NAS, check Fiver Have you thought about helping others with your knowledge? Find Instructions Here  

Or support us by using our affiliate links on Amazon UK and Amazon US

    

 

WE LOVE COFFEE