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GMKtec M6 Ultra specifications and in-depth review

GMKtec M6 Ultra

Manufacturer: GMKtec

The GMKtec M6 Ultra is a compact mini PC built around a laptop-class processor with six cores running at 4.3 GHz, a 5 GHz turbo frequency, and 12 threads supported by multithreading. It pairs that CPU with 32GB of DDR5 memory clocked at 4800 MHz across two channels, and a 1TB NVMe SSD for fast local storage. The unit measures 128.8 mm × 127 mm × 47.8 mm, giving it a volume of just under 782 cm³.

On the graphics side, the M6 Ultra integrates the Radeon 760M GPU, which runs a base clock of 800 MHz and a turbo of 2600 MHz, with 512 shading units, 32 TMUs, and 16 ROPs built on a 4 nm semiconductor process; it supports up to four displays simultaneously via one HDMI 2.0 port, one DisplayPort 1.4 output, and a Thunderbolt 4 port that also delivers USB 4 at 40 Gbps. Connectivity further includes Wi-Fi 6E, Bluetooth 5.2, two 2.5G RJ45 ports, three USB 3.2 Gen 2 Type-A ports, and a 3.5 mm audio jack. Benchmark figures on file show a PassMark multi-core score of 22,965 and a Geekbench 6 multi-core result of 9,208.

Pros
  • Supports Wi-Fi 6E alongside older Wi-Fi standards, covering a wide range of wireless network environments
  • Comes with 32GB of DDR5 RAM running at 4800 MHz across two channels, with headroom to expand up to 256GB
  • The 1TB NVMe SSD provides fast local storage in a compact form factor
  • A single Thunderbolt 4 port doubles as a USB 4 40Gbps connection, adding versatile high-speed peripheral and display options
  • The integrated GPU supports up to four simultaneous displays, making multi-monitor setups possible without a discrete card
  • Two RJ45 ports allow wired network connections on two separate interfaces at the same time
Cons
  • The multiplier is locked, meaning there is no overclocking flexibility for the CPU
  • ECC memory is not supported, which limits reliability for error-sensitive workloads
  • Only one USB 2.0 port and no USB 3.2 Gen 1 ports are available, leaving fewer legacy-speed USB options
  • There is no S/PDIF output and no VGA connector, which restricts certain audio and display setups
  • The warranty period is limited to one year
  • The GPU base clock of 800 MHz is relatively modest, and with only 8 execution units the graphics capability is constrained for demanding visual tasks
Who is this for?

This mini PC is a solid fit for users who need a compact, desk-friendly machine capable of handling everyday productivity, light creative work, and multi-monitor setups of up to four displays. Its six-core CPU with 12 threads, 32GB of DDR5 RAM, and 1TB NVMe SSD make it well-suited for professionals running multiple applications simultaneously, such as office software, web-based tools, or light media work. The inclusion of Wi-Fi 6E, two RJ45 ports, and Thunderbolt 4 also makes it a practical choice for home office or small business environments where flexible, high-speed connectivity is a priority.

Who is this NOT for?

Users with demanding graphics requirements will find this machine limiting, as the integrated Radeon 760M with just 8 execution units and a modest base clock is not equipped for 3D rendering, gaming at high settings, or GPU-accelerated workloads. The locked CPU multiplier rules out any overclocking, which matters to users who want to push performance beyond factory settings. Additionally, the absence of ECC memory support means it is unsuitable for mission-critical or error-sensitive computing tasks such as scientific calculations or server-grade data processing where memory reliability is essential.

General info:

SSD storage capacity 1000GB
Is an NVMe SSD ✓
thickness 127 mm
height 47.8 mm
width 128.8 mm
volume 781.89328 cm³

The GMKtec M6 Ultra ships with a 1TB NVMe SSD, offering fast storage access in a drive format that uses the NVMe interface. Physically, the unit has a width of 128.8 mm, a thickness of 127 mm, and a height of 47.8 mm, resulting in a total volume of roughly 781.89 cm³ — a compact footprint consistent with the mini PC form factor.

CPU:

Thermal Design Power (TDP) 35W
CPU speed 6 x 4.3 GHz
turbo clock speed 5GHz
CPU threads 12 threads
Has integrated graphics ✓
uses multithreading ✓
L3 cache 16 MB
L2 cache 6 MB
L1 cache 384 KB
L2 core 1 MB/core
L3 core 2.67 MB/core
clock multiplier 43
Has an unlocked multiplier ✕
Supports 64-bit ✓
CPU temperature 100 °C

The CPU runs six cores at 4.3 GHz with a turbo ceiling of 5 GHz, delivering 12 threads through multithreading support and a clock multiplier of 43, though the multiplier is locked and cannot be adjusted for overclocking. Its cache hierarchy consists of 384 KB of L1, 6 MB of L2 at 1 MB per core, and 16 MB of L3 at 2.67 MB per core. The processor has a TDP of 35W, supports 64-bit computing, includes integrated graphics, and is rated for a maximum operating temperature of 100 °C.

Graphics card:

GPU clock speed 800 MHz
GPU turbo 2600 MHz
PCI Express (PCIe) version 4
texture mapping units (TMUs) 32
shading units 512
render output units (ROPs) 16
DirectX version DirectX 12
OpenGL version 4.6
OpenCL version 2.1
semiconductor size 4 nm
supported displays 4

The integrated GPU operates at a base clock of 800 MHz and can boost up to 2600 MHz, backed by 512 shading units, 32 texture mapping units, and 16 render output units. It is built on a 4 nm semiconductor process and connects via PCIe 4, with API support covering DirectX 12, OpenGL 4.6, and OpenCL 2.1. The GPU is capable of driving up to four displays simultaneously.

Memory:

RAM 32GB
RAM speed 4800 MHz
DDR memory version 5

The GMKtec M6 Ultra is equipped with 32GB of DDR5 RAM running at a speed of 4800 MHz, providing a modern memory configuration suited to the demands of its processor and integrated graphics.

Connectivity:

Wi-Fi version Wi-Fi 6E (802.11ax), Wi-Fi 6 (802.11ax), Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n)
supports Wi-Fi ✓
Has Bluetooth ✓
Bluetooth version 5.2
USB 2.0 ports 1
USB 3.2 Gen 2 ports (USB-A) 3
USB 3.2 Gen 1 ports (USB-A) 0
USB 3.2 Gen 2 ports (USB-C) 0
USB 4 40Gbps ports 1
USB 4 20Gbps ports 0
USB 3.2 Gen 2x2 ports 0
USB 3.2 Gen 1 ports (USB-C) 0
Thunderbolt 4 ports 1
Thunderbolt 3 ports 0
DisplayPort version DisplayPort 1.4
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 backward-compatible Wi-Fi 6, Wi-Fi 5, and Wi-Fi 4 standards, complemented by Bluetooth 5.2. On the wired side, two RJ45 ports handle network connections, while the USB layout includes three USB 3.2 Gen 2 Type-A ports, one USB 2.0 Type-A port, and one USB 4 40Gbps port that also serves as a Thunderbolt 4 port; there are no USB 3.2 Gen 1 or USB-C ports of any other kind. Display output is handled by one HDMI 2.0 port and one DisplayPort 1.4 output, with no VGA connector present. Audio is covered by a 3.5 mm headset jack, though there is no S/PDIF output.

Benchmarks:

PassMark result 22965
PassMark result (single) 3652
Geekbench 6 result (multi) 9208
Geekbench 6 result (single) 2293
PassMark result (overclocked) 24911

In multi-threaded testing, the M6 Ultra records a PassMark score of 22,965, with a single-threaded result of 3,652 and an overclocked PassMark figure of 24,911. Geekbench 6 results stand at 9,208 for the multi-core run and 2,293 for the single-core run, rounding out the available benchmark data for this unit.

Miscellaneous:

maximum memory amount 256GB
GPU name Radeon 760M
Type Laptop
Uses big.LITTLE technology ✕
instruction sets MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
Has NX bit ✓
GPU execution units 8
Supports ECC memory ✕
memory channels 2
RAM speed (max) 7500 MHz
warranty period 1 years

The processor is a laptop-type CPU that does not use big.LITTLE technology, and it supports a range of instruction sets including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2, along with NX bit for hardware-level security. The integrated GPU is the Radeon 760M with 8 execution units. Memory runs across two channels with a maximum supported RAM speed of 7500 MHz and a ceiling of 256GB, though ECC memory is not supported. The unit carries a warranty period of one year.

Final Verdict

The GMKtec M6 Ultra is a capable mini PC that strikes a reasonable balance between compact form and functional computing power, making it a sensible choice for users who need a space-efficient desktop solution for productivity, multi-display work, and versatile connectivity. Its six-core DDR5 platform with Thunderbolt 4, Wi-Fi 6E, and support for up to four simultaneous displays covers a broad range of everyday and professional use cases within a footprint of under 782 cm³. That said, the locked CPU multiplier, integrated-only graphics, and lack of ECC support do place a ceiling on what it can realistically handle, keeping it firmly outside the territory of graphics-intensive or mission-critical workloads. For users whose needs align with its strengths, the M6 Ultra delivers a well-rounded and thoughtfully equipped platform in a genuinely compact package.