The GMKtec NucBox M5 Ultra follows a Micro-ATX form factor with dimensions of 128.8 mm wide, 127 mm thick, and 47.8 mm tall, resulting in a total volume of roughly 781.89 cm³. It weighs 1440 g and comes equipped with 1000GB of SSD storage, though this drive does not use the NVMe interface.
The processor runs 8 cores at a base clock of 2 GHz with a turbo frequency reaching 4.5 GHz, and supports multithreading for a total of 16 threads. It carries a 15W TDP and has a maximum rated temperature of 95 °C, with a fixed clock multiplier of 20 and no unlocked multiplier available. Cache allocation stands at 512 KB L1, 4 MB L2 (0.5 MB per core), and 16 MB L3 (2 MB per core). The CPU supports 64-bit computing and includes integrated graphics, making it a self-contained processing unit without the need for a discrete GPU.
The integrated GPU operates at a base clock of 300 MHz and can boost up to 2000 MHz, backed by 512 shading units, 32 texture mapping units, and 8 render output units. It is built on a 7 nm process with a transistor count of 10,700 million, and connects via PCIe 3. API support covers DirectX 12, OpenGL 4.6, and OpenCL 2.2, providing a solid range of compatibility for general-purpose and graphics workloads.
The system comes equipped with 32GB of DDR5 RAM running at a speed of 4800 MHz, offering a straightforward but capable memory configuration for a Mini PC in this class.
Wireless connectivity covers Wi-Fi 6E (802.11ax) alongside backwards-compatible Wi-Fi 6, 5, and 4 standards, paired with Bluetooth 5.2. For wired networking, two RJ45 ports are available. The USB layout includes two USB 2.0 ports, two USB 3.2 Gen 2 Type-A ports, and one USB 3.2 Gen 2 Type-C port; there are no USB 3.2 Gen 1, USB 4, Thunderbolt 3, or Thunderbolt 4 ports. Display output is handled by one HDMI 2.0 port and one DisplayPort 1.4 output, while VGA and S/PDIF are absent. Audio connectivity includes both an AUX input and a 3.5 mm headset jack.
In benchmark testing, the system achieves a PassMark multi-core score of 18,042 and a single-core result of 3,006, with an overclocked PassMark score of 19,844. Geekbench 6 results come in at 6,277 for multi-core and 1,633 for single-core performance.
The system uses a laptop-class CPU paired with a Radeon Vega 8 GPU featuring 8 execution units, and supports up to 64GB of RAM across two memory channels, with a maximum RAM speed of 4267 MHz. It is compatible with ECC memory but does not include an external memory slot, and storage does not rely on flash memory. The CPU does not use big.LITTLE technology but does include an NX bit for hardware-level security, and supports a broad set of instruction sets including MMX, AES, AVX, AVX2, F16C, FMA3, SSE 4.1, and SSE 4.2. The product carries a one-year warranty.
