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GMKtec M5 Ultra specifications and in-depth review

GMKtec M5 Ultra

Manufacturer: GMKtec

The GMKtec M5 Ultra is a compact mini PC built around a mobile-class processor with a 15W TDP, making it a space-conscious desktop solution that fits neatly into tight environments. With dimensions of roughly 128.8 × 127 × 47.8 mm and a volume under 782 cm³, this unit packs a 32GB DDR4 configuration into a chassis that remains practical for desk or shelf placement. It ships with a 512GB NVMe SSD and supports up to 64GB of RAM across two memory channels, giving users room to expand should their workload demand it.

On the connectivity side, the M5 Ultra covers a wide range of I/O needs, including two USB 2.0 ports, two USB 3.2 Gen 2 Type-A ports, one USB 3.2 Gen 2 Type-C port, dual RJ45 Ethernet jacks, an HDMI 2.0 output, a DisplayPort, and a 3.5mm audio jack. Wireless options include Wi-Fi 6E and Bluetooth 5.2. The integrated Radeon Vega 8 GPU runs at a base clock of 300 MHz with a turbo up to 2000 MHz, backed by 512 shading units and DirectX 12 support. Benchmark results place the system at a PassMark score of 17,607, with a single-core result of 2,965 and a Geekbench 6 multi-core score of 6,198.

Pros
  • Supports Wi-Fi 6E alongside Wi-Fi 6, Wi-Fi 5, and Wi-Fi 4, covering a wide range of wireless network environments
  • Dual RJ45 Ethernet ports allow two separate wired network connections simultaneously
  • ECC memory support adds a layer of data reliability that is uncommon in compact desktop systems
  • Memory is upgradeable up to 64GB across two channels, leaving room to grow beyond the stock 32GB configuration
  • The 512GB NVMe SSD provides faster storage access compared to SATA-based alternatives in the same class
  • Bluetooth 5.2 is included for connecting wireless peripherals without additional adapters
Cons
  • The GPU base clock of 300 MHz is low, and while turbo reaches 2000 MHz, graphics headroom is limited by the 8 execution units available
  • No USB 4, Thunderbolt 3, or Thunderbolt 4 ports are present, restricting high-bandwidth peripheral options
  • Only a single USB 3.2 Gen 2 Type-C port is available, limiting simultaneous use of faster USB-C devices
  • There is no external memory card slot, so local storage expansion is restricted to internal options only
  • The clock multiplier is locked, meaning there is no overclocking flexibility through multiplier adjustment
  • The warranty period is limited to one year, which is shorter than what some competing mini PC platforms offer
Who is this for?

This mini PC is well suited to users who need a compact desktop for everyday productivity, light office workloads, or home use where desk space is limited. The 32GB of DDR4 RAM with ECC support and dual RJ45 ports make it a reasonable fit for small business environments or network-attached tasks where data reliability and wired connectivity matter. Users who want flexible wireless networking will also find the Wi-Fi 6E support practical, and the NVMe SSD ensures that general system responsiveness remains snappy for document work, web browsing, and light media consumption.

Who is this NOT for?

Users with demanding graphics or gaming requirements will find the Radeon Vega 8 integrated GPU insufficient, as its 8 execution units and limited shading pipeline are not built for rendering-intensive tasks or modern titles at meaningful settings. Similarly, professionals working with high-bandwidth peripherals such as external GPUs, high-speed NVMe enclosures, or Thunderbolt-dependent devices will be held back by the absence of Thunderbolt 3, Thunderbolt 4, and USB 4 ports. The locked clock multiplier also means that users looking to push beyond stock performance through overclocking will have no avenue to do so on this platform.

General info:

SSD storage capacity 512GB
form factor Micro-ATX
release date December 2023
Is an NVMe SSD ✓
thickness 127 mm
height 47.8 mm
width 128.8 mm
volume 781.89328 cm³

The GMKtec 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 — a compact footprint suited for constrained desktop setups. Storage is handled by a 512GB NVMe SSD, which uses the faster NVMe interface rather than a traditional SATA connection, offering quicker data access within that slim chassis.

CPU:

Thermal Design Power (TDP) 15W
CPU speed 8 x 2 GHz
turbo clock speed 4.5GHz
CPU threads 16 threads
Has integrated graphics ✓
uses multithreading ✓
L3 cache 16 MB
L2 cache 4 MB
L1 cache 512 KB
L2 core 0.5 MB/core
L3 core 2 MB/core
clock multiplier 20
Has an unlocked multiplier ✕
Supports 64-bit ✓
CPU temperature 95 °C

The processor in the GMKtec M5 Ultra runs eight cores at a base speed of 2 GHz each, with a turbo clock speed reaching up to 4.5 GHz, and supports multithreading for a total of 16 threads. It operates within a 15W TDP envelope and has a maximum rated temperature of 95 °C, with a fixed clock multiplier of 20 that cannot be unlocked for overclocking. Cache is distributed across three levels — 512 KB of L1, 4 MB of L2 at 0.5 MB per core, and 16 MB of L3 cache at 2 MB per core — supporting efficient data throughput for the cores. The CPU is fully 64-bit compatible, includes integrated graphics, and carries a clock multiplier of 20.

Graphics card:

GPU clock speed 300 MHz
GPU turbo 2000 MHz
PCI Express (PCIe) version 3
texture mapping units (TMUs) 32
shading units 512
render output units (ROPs) 8
DirectX version DirectX 12
OpenGL version 4.6
OpenCL version 2.2
semiconductor size 7 nm
number of transistors 10700 million

The integrated GPU operates at a base clock of 300 MHz, climbing to a turbo speed of 2000 MHz under load, and is built on a 7 nm process with 10,700 million transistors. It features 512 shading units, 32 texture mapping units, and 8 render output units, all communicating via PCIe 3. API support covers DirectX 12, OpenGL 4.6, and OpenCL 2.2, making the graphics solution capable of handling modern display and compute workloads within the constraints of an integrated design.

Memory:

RAM 32GB
RAM speed 3200 MHz
DDR memory version 4

The GMKtec M5 Ultra comes equipped with 32GB of DDR4 RAM running at 3200 MHz, providing a solid baseline of memory bandwidth for everyday and multitasking workloads within its compact form factor.

Connectivity:

Wi-Fi version Wi-Fi 6E (802.11ax), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax), Wi-Fi 4 (802.11n)
supports Wi-Fi ✓
Has Bluetooth ✓
Bluetooth version 5.2
USB 2.0 ports 2
USB 3.2 Gen 2 ports (USB-A) 2
USB 3.2 Gen 1 ports (USB-A) 0
USB 3.2 Gen 2 ports (USB-C) 1
USB 4 40Gbps ports 0
USB 4 20Gbps ports 0
USB 3.2 Gen 2x2 ports 0
USB 3.2 Gen 1 ports (USB-C) 0
Thunderbolt 4 ports 0
Thunderbolt 3 ports 0
DisplayPort outputs 1
HDMI version HDMI 2.0
HDMI ports 1
RJ45 ports 2
has a socket for a 3.5 mm audio jack ✓
has a VGA connector ✕
Has S/PDIF Out port ✕

Wireless connectivity covers Wi-Fi 6E (802.11ax) alongside Wi-Fi 6, Wi-Fi 5, and Wi-Fi 4, paired with Bluetooth 5.2 for short-range peripherals. On the wired side, the unit provides two USB 2.0 ports, two USB 3.2 Gen 2 Type-A ports, and one USB 3.2 Gen 2 Type-C port, while USB 3.2 Gen 1, USB 4, USB 3.2 Gen 2x2, Thunderbolt 3, and Thunderbolt 4 are not present. Display output is handled by one HDMI 2.0 port and one DisplayPort, and dual RJ45 Ethernet jacks allow for wired network connections. A 3.5mm audio jack is included, though there is no VGA connector or S/PDIF output.

Benchmarks:

PassMark result 17607
PassMark result (single) 2965
Geekbench 6 result (multi) 6198
Geekbench 6 result (single) 1629
PassMark result (overclocked) 19284

In benchmark testing, the GMKtec M5 Ultra achieves a PassMark multi-core score of 17,607 with a single-core result of 2,965, and an overclocked PassMark score of 19,284. Geekbench 6 results place the system at 6,198 in the multi-core test and 1,629 in the single-core test, giving a measurable picture of the processor's performance across both parallel and sequential workloads.

Miscellaneous:

maximum memory amount 64GB
has an external memory slot ✕
GPU name Radeon Vega 8
Type Laptop
instruction sets MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
Uses big.LITTLE technology ✕
Has NX bit ✓
GPU execution units 8
Supports ECC memory ✓
memory channels 2
RAM speed (max) 4267 MHz
warranty period 1 years

The system uses a laptop-class CPU paired with a Radeon Vega 8 GPU that has 8 execution units, and memory can be expanded up to a maximum of 64GB across two channels, with a peak supported RAM speed of 4267 MHz. ECC memory is supported, which adds a layer of data integrity useful in reliability-sensitive workloads, though there is no external memory slot available. The processor does not use big.LITTLE architecture but does carry the NX bit for hardware-level execution protection, and it supports a broad set of instruction sets including MMX, AES, AVX, AVX2, F16C, FMA3, SSE 4.1, and SSE 4.2. The warranty period is 1 year.

Final Verdict

The GMKtec M5 Ultra is a compact mini PC that delivers a well-rounded specification set for users whose needs center around productivity, light multitasking, and reliable connectivity in a small footprint. Its 32GB DDR4 configuration with ECC memory support and dual RJ45 networking give it a practical edge in home office or small business settings where stability and wired connectivity carry weight. While the integrated Radeon Vega 8 graphics and absence of high-bandwidth ports like Thunderbolt naturally narrow the scope of demanding use cases, the platform makes sensible trade-offs within its thermal and size constraints. For users seeking a dependable, space-conscious desktop with solid memory capacity, NVMe storage, and broad wireless support, the M5 Ultra represents a coherent and focused mini PC option.