GMKtec Mini PC M8

GMKtec Mini PC M8

By GMKtec · Desktop Computers · Phones & Computers

  • AMD Ryzen 5 PRO 6650H, 6 cores, 12 threads, 3.3GHz base, up to 4.5GHz
  • AMD Radeon 660M Graphics, 6 cores, up to 1900MHz
  • 16GB LPDDR5-6400 onboard, non-upgradable
  • 2x M.2 2280 PCIe 4.0 x4 SSD slots, up to 16TB total
  • Wi-Fi 6E, Bluetooth 5.2, dual 2.5G Ethernet

Lowest price seen
~$389.99 (approx.)
from $389.99 at Amazon

Prices are snapshots. Check the current price with the store.

Summary

An ultra-compact mini PC built around a 6-core Ryzen 5 PRO 6650H, with dual 2.5G Ethernet, USB4 and a front OCuLink port for an external GPU. Its 16GB of RAM is soldered, so buy it for the connections, not for a later memory upgrade.

Strengths

  • OCuLink gives an external GPU a direct PCIe Gen4 x4 link, which is rare in this price class.
  • Dual 2.5G Ethernet suits homelab, NAS and virtualization builds.
  • The all-metal chassis opens with four thumb screws, and both M.2 slots are user-accessible.
  • A 6-core CPU and fast LPDDR5 memory handle office work, multitasking and light content creation.
  • It runs cool under normal loads and is virtually silent at idle.
  • Two M.2 slots leave room to add storage without replacing the boot drive.

Weaknesses

  • RAM is soldered at 16GB and cannot be upgraded.
  • The Radeon 660M is RDNA 2 and weak for AAA gaming and GPU-heavy creative work.
  • The fan becomes audible under load and shows pulsing behavior.
  • No VESA mount is included despite the compatibility being advertised.
  • Notebookcheck could not get the front USB-C DisplayPort output working with a USB-C monitor.
  • OCuLink is not hot-plug safe: power the system off before connecting or disconnecting an eGPU.

Verified specifications

CPUAMD Ryzen 5 PRO 6650H, 6 cores, 12 threads, 3.3GHz base, up to 4.5GHz boost, 3MB L2 / 16MB L3 cache, Zen 3+ (6nm).
GPUAMD Radeon 660M, 6 CUs, up to 1900MHz, RDNA 2.
RAM16GB LPDDR5-6400 (8GB x2 dual-channel), soldered and non-upgradable.
Storagetwo M.2 2280 PCIe slots, up to 8TB each and 16TB total; the shipped 512GB or 1TB drive is PCIe 3.0.
NetworkingWi-Fi 6E (MediaTek MT7922), Bluetooth 5.2, dual 2.5G Ethernet (Realtek RTL8125).
Display outputsHDMI 2.0, DisplayPort 1.4 and USB4 (DP 1.4), triple display support up to 8K.
USBone USB4 (40Gbps, 100W PD), three USB 3.2 Gen2 Type-A and one USB 2.0.
OCuLinkone OCuLink port (PCIe Gen4 x4) on the front panel.
Power profilesSilent (28W), Balanced (35W), Performance (40W).
Coolingdual-fan active cooling with copper heat pipes.
Dimensions4.21 × 4.37 × 2.48 in (107 × 111 × 63 mm); about 490g.
Power supply120W AC adapter included.
In the boxmini PC, power adapter, HDMI cable, user manual and warranty card; no VESA mount, keyboard or mouse.
OSWindows 11 Pro pre-installed.
Warranty1 year (12 months).
Full research notes and sources

Performance and graphics

Independent tests agree the CPU is the strong half. TechRadar recorded PCMark Overall 5662 and Cinebench CPU Multi 9463; Notebookcheck measured Cinebench R23 Multi 9561 and Geekbench 6.7 Multi 7813; wccftech, testing at 45W, got Cinebench R23 Multi 10408 and Geekbench 6 Multi 7511. That is plenty for office work, browsing and light editing.

Gaming leans on the integrated Radeon 660M. At 1080p wccftech saw Cyberpunk 2077 at 44 FPS and Starfield at 26 FPS with upscaling on, Civilization VI at 85 FPS, Resident Evil 4 Remake at 32 FPS, Fortnite at 59 FPS, Forza Horizon 5 at 59 FPS and DOTA 2 at 95 FPS. Demanding titles need reduced settings, and newer Ryzen 7000/8000 or Intel Core Ultra mini PCs beat it on both CPU and GPU.

The OCuLink port is the reason to pick this box over cheaper mini PCs. It carries PCIe Gen4 x4 to an external GPU, which avoids the bandwidth ceiling of a USB4 enclosure. Treat it as a build step, though: the port is not hot-plug safe, so shut the machine down first. An OCuLink cable is not included.

Dual 2.5G Ethernet plus Wi-Fi 6E and Bluetooth 5.2 make the M8 a natural fit for a homelab, NAS or virtualization node. In r/MiniPCs threads, owners praise the build quality, the connectivity and the value, and name the OCuLink port as the reason they picked it. Check your workload against the 16GB ceiling before buying, because virtualization and heavy multitasking are exactly where the soldered memory hurts.

Noise, heat and serviceability

Idle temperatures sit around 35–45°C and climb to 70–85°C under load. The fan is near silent at idle, rises to roughly 30–35 dB under moderate load and 40–45 dB at maximum, and Notebookcheck calls out a pulsing behavior that owners in r/MiniPCs also report under sustained load. Power draw is about 15–20W idle, 35–40W moderate and 50–54W at maximum; wccftech reports 45–54W under load.

Servicing is straightforward: the case is held by four thumb screws and the board is reachable with a Phillips screwdriver. The WLAN module is removable and both M.2 2280 slots are accessible. The RAM is soldered, so it is not a replaceable part. GMKtec lists a 1-year warranty, and no failure-rate data exists for a machine this new. One r/MiniPCs owner reported receiving a different configuration than ordered, so check the box contents when it arrives. Whether the China-based warranty process is practical for US buyers is an open question.

Is it worth it?

At $330 or less the M8 is a strong value for office and homelab use, and it stays good value up to about $360. From $361 to $400 it is fair: Beelink’s SER8 (Ryzen 7 8845HS) and Minisforum’s UM790 Pro (expandable RAM) may offer more all-round performance at similar prices. Above $400 the value is weak unless you specifically need OCuLink, dual 2.5G LAN and the small footprint.

Retail prices vary. GMKtec’s own store lists the 16GB/512GB at $389.99, marked down from $479.99. Micro Center lists the 16GB/512GB at $429.99 in-store, while Newegg lists $389.99 for 512GB and $409.99 for 1TB. There is no keyboard, mouse, VESA mount or OCuLink cable in the box, so budget for those if you need them.

Which model this is

This page covers the GMKtec NucBox M8, model M8P, with the AMD Ryzen 5 PRO 6650H. It was announced in November 2025 and ships as 16GB/512GB or 16GB/1TB; RAM is fixed at 16GB in both. Don’t confuse it with the GMKtec M6 Ultra, K12 or EVO series.

The US listing for the 16GB/512GB configuration is ASIN B0G1YHHH86.

Sources

Manufacturer:

Independent reviews:

Owner reports:

Buying guides for this category

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