GMKTec NucBox G9 Flash NAS Review – Insane Value?
The GMKtec NucBox G9 represents the brand’s first attempt to transition from the mini PC market into the world of network-attached storage (NAS). This 4-bay, SSD-only system targets entry-level users and light workloads, offering affordability and versatility in a compact form factor. Designed as a hybrid between a mini PC and a NAS, the G9 comes with pre-installed dual operating systems—Windows 11 Pro and Ubuntu—and a range of features aimed at balancing performance, cost, and functionality.
At its core, the G9 is powered by Intel’s efficient N150 processor, a quad-core chip designed for low-power applications. Paired with 12GB of LPDDR5 memory, it’s clear the system isn’t intended for heavy-duty tasks but rather for home use, backups, and small-scale media hosting.
The reliance on M.2 NVMe SSDs rather than traditional hard drives results in silent operation and faster performance, albeit at a higher cost per terabyte.
While it offers an impressive range of connectivity options, the lack of 10GbE networking and its reliance on PCIe Gen 3 x2 lanes for storage performance may limit its appeal to users with more demanding needs. This review dives deep into the GMKtec NucBox G9 to explore its design, features, and performance, and determine whether it’s worth considering as an entry-level NAS.
GMKTec NucBox G9 NAS Review – Quick Conclusion / TL;DR
The GMKtec NucBox G9 is an affordable, compact NAS system that doubles as a mini PC. With support for up to 32TB of SSD storage across four M.2 NVMe slots, it’s designed for quiet and efficient operation. It’s powered by an Intel N150 processor and features dual 2.5GbE ports, multiple USB connections, and dual HDMI outputs. While the system is cost-effective, it has limitations in thermal management and external connectivity. This device is ideal for home users and small-scale setups that prioritize affordability and low noise over raw performance. However, the reliance on plastic for the chassis, lack of SSD heatsinks, and PCIe Gen 3 x2 lanes limit its appeal for heavy workloads. Users should also be prepared to configure third-party NAS software, as the pre-installed operating systems are not optimized for NAS-specific functionality. If you’re looking for an entry-level, SSD-only NAS with minimal noise and power consumption, the GMKtec NucBox G9 is a compelling option. However, power users or those requiring advanced features like 10GbE or robust thermal performance may find it restrictive. It’s a promising debut for GMKtec in the NAS market, but with room for improvement in future iterations.
Where to Buy? How Much?
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| Component | Details |
|---|---|
| CPU | Intel N150 (Quad-Core, 3.6GHz) |
| Memory | 12GB LPDDR5-4800 |
| Storage | 4 x M.2 NVMe (PCIe Gen 3 x2) |
| Networking | 2 x 2.5GbE LAN |
| Ports | 3 x USB-A 3.2 Gen 2, 1 x USB-C (data & video), 1 x USB-C (power), 2 x HDMI (4K 60Hz) |
| Pre-Installed OS | Windows 11 Pro, Ubuntu Linux |
| Power Consumption | 19-30W |
| Chassis Material | Plastic |
| Price | Starting at $169 ($216 for 1TB SSD Model) |
GMKTec NucBox G9 Flash Review – Design
The GMKtec NucBox G9 features a compact, lightweight plastic chassis, which contributes to its affordability but comes with certain drawbacks. While the design is minimalistic and functional, the reliance on plastic for the panel covering the four M.2 NVMe slots raises concerns about thermal performance. Metal would have been a better choice to aid heat dissipation, particularly in an SSD-only system where temperatures can rise quickly under load.
Inside, the system accommodates up to four M.2 NVMe SSDs, each operating at PCIe Gen 3 x2 speeds. This configuration supports up to 32TB of total storage, providing flexibility for users with varying needs.
However, the Gen 3 x2 limitation caps throughput at 2GB/s per drive, which may bottleneck performance in high-demand scenarios. While the system can handle basic RAID configurations, its performance in RAID setups is limited by the hardware.
The absence of heatsinks for the SSDs is a notable oversight. Although pre-configured models with SSDs include basic heatsinks, users adding their own drives will need to invest in aftermarket cooling solutions. The plastic panel covering the storage bays further exacerbates heat dissipation challenges, as it traps heat rather than dispersing it effectively. This is really only noticeable when the system was a especially high use, but it did give me pause for thought. (Thermal test with HikMicro Mini v2 Thermal Camera on Amazon HERE )
Despite these limitations, the G9’s storage configuration is impressive for its price range. SSD-only setups ensure silent operation and faster performance compared to traditional hard drives, making it ideal for environments where noise and energy efficiency are priorities.
GMKTec NucBox G9 Flash Review – Connections
The G9 offers a solid selection of connectivity options for a device in its class. It includes two 2.5GbE LAN ports, allowing users to link aggregate bandwidth or set up separate networks. During testing, these ports easily reached their full potential, delivering consistent performance for both independent and linked configurations. However, the absence of 10GbE networking may deter users with more demanding network requirements.
In addition to networking, the system provides four USB 3.2 Gen 2 ports—three Type-A and one Type-C—offering up to 10Gbps of data transfer per port. The USB-C port doubles as a video output, complementing the two HDMI 2.0 ports that support 4K resolution at 60Hz. These features make the G9 versatile for dual roles as a NAS and a lightweight desktop workstation.
Power input is handled via a dedicated USB-C port connected to an external 65W power supply. This compact power solution aligns with the G9’s low-power design, but it also means there’s no internal power redundancy, which might concern users deploying the device in mission-critical environments.
While the ports and connections are adequate for most use cases, the lack of expandability—such as PCIe slots for adding 10GbE or other features—limits its future-proofing. Users seeking advanced connectivity options may need to consider alternatives or rely on external adapters.
| Where to Buy? |
GMKTec NucBox G9 Flash Review – Internal Hardware
The Intel N150 processor is the heart of the GMKtec NucBox G9. This quad-core chip operates at a base clock of 1GHz, with a boost clock of 3.6GHz. Designed for efficiency, it features a 6W TDP, making it well-suited for low-power applications like home NAS setups. While not a powerhouse, it handles light workloads effectively, including file sharing, backups, and media streaming.
| Feature | Details |
|---|---|
| Architecture | Intel Twice Lake |
| Cores / Threads | 4 Cores / 4 Threads |
| Base Clock Speed | 1.0 GHz |
| Boost Clock Speed | Up to 3.6 GHz |
| TDP (Thermal Design Power) | 6W |
| Cache | 6MB Intel Smart Cache |
| Memory Support | LPDDR5-4800, DDR4-3200 (dual-channel) |
| Graphics | Integrated Intel UHD Graphics |
| Graphics Frequency | Up to 1.0 GHz |
| Max Display Resolution | 4K @ 60Hz (via HDMI/DisplayPort) |
| PCIe Version | Gen 3 (Up to 9 lanes) |
| Instruction Set | 64-bit |
| Special Features | Intel VT-x, VT-d, AES-NI, Intel Speed Shift |
| Manufacturing Process | 10nm Intel Process |
| Release Date | Q1 2025 |
Paired with 12GB of LPDDR5-4800 memory, the system offers a decent amount of RAM for its intended purposes. However, the memory is soldered onto the board, meaning it cannot be upgraded. This limitation may frustrate users who anticipate scaling up their usage over time. The LPDDR5 memory’s efficiency helps offset this drawback by delivering faster performance compared to older DDR4 standards.
Storage capabilities are impressive, with support for up to four M.2 NVMe drives. These slots operate at PCIe Gen 3 x2, which, while adequate for most entry-level NAS tasks, may bottleneck performance in more demanding scenarios.
The system’s internal hardware also includes an eMMC drive for the pre-installed operating systems, but its limited 64GB capacity may prompt many users to replace it or install a new OS on an M.2 SSD.
The hardware design prioritizes cost-efficiency, which is evident in the lack of ECC memory support and limited thermal management. While these decisions align with the device’s target audience, they reinforce its position as an entry-level solution rather than a high-performance NAS. In other words – KEEP YOUR EXPECTATIONS RELATIVE!!!
GMKTec NucBox G9 Flash Review – Software
The G9 is marketed as a “dual-system” NAS, shipping with Windows 11 Pro and Ubuntu Linux pre-installed. This flexibility allows users to operate the device as a mini PC or a lightweight NAS out of the box. However, neither OS is tailored for NAS-specific functionality, and users seeking advanced features like RAID management or robust file sharing will need to install third-party software.
Popular NAS operating systems such as TrueNAS, Unraid, or OpenMediaVault are compatible with the G9, but they require manual installation and configuration. While this isn’t a deal-breaker, it may deter users unfamiliar with NAS software or those seeking a plug-and-play solution. Ubuntu, while functional, lacks the intuitive tools and features found in dedicated NAS systems.
The inclusion of a Windows 11 Pro license is a welcome addition for users who may want to use the device as a general-purpose PC. However, this feature feels somewhat misplaced in a NAS-focused product, as most users will likely replace the OS with something more suited to storage tasks. Additionally, the 64GB eMMC drive hosting the OS is insufficient for many use cases, necessitating an upgrade to an M.2 SSD.
Overall, the software experience is mixed. While the dual OS option adds versatility, the lack of NAS-specific tools and reliance on user-driven configuration highlight the device’s limitations as a turnkey NAS solution.
GMKTec NucBox G9 Flash Review – Performance & Tests
In performance testing, the G9’s storage read speeds peaked at 1.4–1.5GB/s per drive, which is respectable for its hardware. Write speeds were less consistent, averaging 400–500MB/s under sustained load.
Interestingly (and still being checked into since this review was started), the system features multiple ASM1182e Gen 2 packet switches to carve up the downstream of the PCIe lanes internally (understandable for a modest CPU to require PCIe switches to allow for so many M.2s), but I suspect that THIS is why the write performance was so low. Still checking and will update ASAP here and/or in the video.
The dual 2.5GbE ports delivered solid external performance, easily saturating their bandwidth in both independent and aggregated configurations.
Thermal management proved to be a challenge. Without included SSD heatsinks and with a plastic panel covering the storage bays, temperatures rose quickly under load. Idle temperatures were manageable, but sustained use resulted in throttling, emphasizing the need for aftermarket cooling solutions. This is especially important for users planning to use the device in environments with higher ambient temperatures.
Noise levels were impressively low, even with all three fans running. During idle, the system operated nearly silently, while under load, noise levels remained below 40dB. Power consumption ranged from 19–20W at idle to 28–30W under load, making it an efficient option for users concerned about energy usage.
Overall, the G9 performs well for an entry-level system but struggles in scenarios requiring sustained performance. Its thermal limitations and PCIe bottlenecks make it better suited for light to moderate workloads rather than demanding applications.
GMKTec NucBox G9 Flash Review – Conclusion & Verdict
The GMKtec NucBox G9 is an ambitious first step for the brand into the NAS market, blending elements of mini PCs with network-attached storage. Its compact, lightweight design, combined with the use of M.2 NVMe SSDs, makes it an efficient, quiet solution for home users or small-scale deployments. With a competitive starting price of $150-199 and dual operating systems pre-installed, it offers value for users who are comfortable setting up their own NAS software. The inclusion of dual 2.5GbE ports, multiple USB connections, and support for up to 32TB of SSD storage ensures it caters to a wide variety of use cases, from media hosting to backups. However, its reliance on plastic for the chassis and the absence of SSD heatsinks highlight thermal management as a weak point, making it less suitable for sustained or intensive workloads without additional investment in cooling solutions.
While the device performs well in basic NAS tasks, its hardware limitations, such as PCIe Gen 3 x2 slots and a non-upgradable memory configuration, may leave power users wanting more. The lack of 10GbE networking and limited built-in NAS software tools further cement its position as an entry-level system rather than a fully-featured solution. Ultimately, the NucBox G9 is a solid choice for users seeking an affordable, low-power NAS for quiet environments but less ideal for those with advanced needs or performance-intensive requirements. As a debut NAS product, it succeeds in offering value within its scope while leaving room for refinement in future iterations.
| Pros | Cons |
|---|---|
| Affordable starting price ($150-199 for base model) | Limited to PCIe Gen 3 x2 lanes for M.2 NVMe slots |
| Compact and lightweight design | Plastic chassis reduces thermal efficiency |
| Quiet operation, even under load | No SSD heatsinks included |
| Dual 2.5GbE ports with solid performance | Lacks 10GbE networking |
| Supports up to 32TB of SSD storage | Pre-installed OS (Windows/Ubuntu) not NAS-optimized |
| Low power consumption (19–30W) | Non-upgradable 12GB LPDDR5 memory |
| Pre-installed dual operating systems | Not a true turnkey NAS solution |
| Flexible connectivity options (USB, HDMI, etc.) | Thermal throttling under heavy loads |
| Where to Buy? |
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