CWWK N355 10×2 NAS/Router Box Review

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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