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GMKtec NucBox M6 Ultra

GMKtecMini PC reference

GMKtec NucBox M6 Ultra

GMKtec NucBox M6 Ultra combines AMD Ryzen 5 7640HS with integrated Radeon 760M for office multitasking, development and media work. Gaming and GPU-accelerated applications depend on their settings and driver support; the graphics specification alone is not a measured performance result. Replaceable SO-DIMM memory gives it a path for later RAM upgrades. Two Ethernet interfaces are useful for a small home lab, with actual throughput depending on storage and network equipment.

Processor
AMD Ryzen 5 7640HS
Graphics
Radeon 760M
Memory
32 GB
Storage
1 TB
Configuration being compared32 GB RAM · 1 TB SSDNew
US stores · USD

Prices across stores

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View price history

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RetailerAvailabilityListed priceLast checkedRetailer website
In stock$679.99Lowest checkedView at GMKtec
Sold by GMKtec-OfficialAffiliate link
In stock$679.99Lowest checkedView at Newegg

Availability reflects the latest store check. Shipping, tax, coupons and checkout totals are not included; confirm them at the store.

Specifications

Processor, graphics and installed memory/storage describe the selected configuration. Expansion limits and connectivity describe the model; optional hardware is identified separately. References are collected in About this data below.

Processor
AMD Ryzen 5 7640HS
Graphics
Radeon 760M
Memory
32 GB
Storage
1 TB
Ports & displays
USB-A: 3 × USB 3.2 Gen2 (10Gbps) + 1 × USB 2.0; USB4: 1 × USB4 full-function port; HDMI: 1 × HDMI 2.0 (up to 4K@60Hz); DisplayPort: 1 × DisplayPort (up to 8K@60Hz); Audio: 1 × 3.5mm CTIA Audio Jack; LAN: 2 × RJ45 2.5G Ethernet; Power: 1 × DC IN (5.5/2.5mm); Reset: 1 × Reset Button
Ethernet, Wi-Fi & Bluetooth
Wi-Fi 6E (up to 2.4Gbps); Bluetooth 5.2; Dual 2.5G Ethernet LAN Link rates are theoretical, not measured throughput.
RAM & storage upgrades
2 × SO-DIMM Slots, DDR5 Memory, 16GB / 32GB configurations, Supports up to 128GB. 2 × M.2 2280 PCIe 4.0 ×4 SSD slots, supports up to 8TB per slot
Power supply & power limits
Power supply / DC input rating: DC Power Adapter 19V / 6.32A, 120W. This is a supply rating, not measured wall-power consumption.
Dimensions & weight
128.8 × 127 × 47.8 mm; 528 g. Dimensions follow the manufacturer order; axes are not labeled.

What owners say

Four reviewers had this Ryzen 5 7640HS machine, and it fixes most of what was wrong with the plain M6. The front USB4 port is real — an external PCIe 4.0 drive read at about 3,200 MB/s — DPC latency was low and 4K playback had no dropouts, so it works as a streaming client. It is still not quiet under load: 37 to 39 dB(A) in one lab, 41 to 43.5 dB at 30 cm with a slight high-pitched hum in another, and verified store owners who expected silence were disappointed. At idle it is silent or close to it. Heat is well handled — a brief 86 °C, then 80 °C at a steady 45 W with no real performance loss — and the BIOS offers 35, 45 and 50 W modes, 45 W by default. It draws about 10 W at idle and around 70 W under full load. Every review unit came with a PCIe Gen 3 SSD in slots that take Gen 4. A clip-off lid hides a screwed plate carrying a fan, and standard M.2 heatsinks will not fit under the top. Reviewers split on the mostly plastic build. Owners run it under Proxmox with Home Assistant and as a SteamOS couch PC, and one reviewer found it close to Geekom's AX8 Max for $240 less.

For whom
A capable everyday PC, streaming client or home-lab box with a genuine USB4 port, at a low price.
Not for
Quiet rooms under sustained load, heavy AAA gaming and GPU-focused work.

Our own summary of 5 published sources, reviewed Sep 23, 2026. We have not tested this Mini PC ourselves; the sources are listed under About this data.

Performance

3 sourced resultsseconds

Same application version, scene, samples, resolution and CPU or GPU render backend.

Externally reported measurements. MiniPC.guru has not independently reproduced these tests.

265 secondsIndependent review

Mini PC at a great price with AMD Ryzen power and USB4 versatility - GMKtec NucBox M6 Ultra review

By Sebastian Bade · Notebookcheck

Source published
Sep 22, 2025
Test performed
Not reported by source
Added to MiniPC.guru
Sep 23, 2026
Source reviewed
Sep 23, 2026
Tested hardware
AMD Ryzen 5 7640HS, 6 cores / 12 threads, 4.3-5.0 GHz, Phoenix-HS (Zen 4), running in the factory balanced mode (45 W) · AMD Radeon 760M, Adrenalin 25.9.1 (not used: this row renders on the processor) · 32 GB DDR5 at 4,800 MT/s (the 32 GB + 1 TB configuration under test) · not applicable: a CPU render does not read from disk while the measurement runs; the unit carried a 1 TB TWSC SSD on PCIe 3.0 x4
Software / version / OS
Blender · 2.79 · Microsoft Windows 11 Pro
Power profile
Factory-set balanced mode (45 W), as the review states; performance (50 W) and silent (35 W) modes exist in the BIOS; no Windows power plan is named
Test conditions
BMW27 standard demo scene, CPU render backend as the table labels it (v2.79 BMW27 CPU). Samples and output resolution are those stored in the standard scene file

Editorial review checks the source and documentation; it does not certify the measurement or mean we tested the device ourselves.

434 secondsIndependent review

Mini PC at a great price with AMD Ryzen power and USB4 versatility - GMKtec NucBox M6 Ultra review

By Sebastian Bade · Notebookcheck

Source published
Sep 22, 2025
Test performed
Not reported by source
Added to MiniPC.guru
Sep 23, 2026
Source reviewed
Sep 23, 2026
Tested hardware
AMD Ryzen 5 7640HS, 6 cores / 12 threads, 4.3-5.0 GHz, Phoenix-HS (Zen 4), running in the factory balanced mode (45 W) · AMD Radeon 760M, Adrenalin 25.9.1 (not used: this row renders on the processor) · 32 GB DDR5 at 4,800 MT/s (the 32 GB + 1 TB configuration under test) · not applicable: a CPU render does not read from disk while the measurement runs; the unit carried a 1 TB TWSC SSD on PCIe 3.0 x4
Software / version / OS
Blender · 3.3 · Microsoft Windows 11 Pro
Power profile
Factory-set balanced mode (45 W), as the review states; performance (50 W) and silent (35 W) modes exist in the BIOS; no Windows power plan is named
Test conditions
Classroom standard demo scene, CPU render backend as the table labels it (v3.3 Classroom CPU). Samples and output resolution are those stored in the standard scene file

Editorial review checks the source and documentation; it does not certify the measurement or mean we tested the device ourselves.

2,112 secondsIndependent review

Mini PC at a great price with AMD Ryzen power and USB4 versatility - GMKtec NucBox M6 Ultra review

By Sebastian Bade · Notebookcheck

Source published
Sep 22, 2025
Test performed
Not reported by source
Added to MiniPC.guru
Sep 23, 2026
Source reviewed
Sep 23, 2026
Tested hardware
AMD Ryzen 5 7640HS, 6 cores / 12 threads, 4.3-5.0 GHz, Phoenix-HS (Zen 4), running in the factory balanced mode (45 W) · AMD Radeon 760M, Adrenalin 25.9.1 (not used: this row renders on the processor) · 32 GB DDR5 at 4,800 MT/s (the 32 GB + 1 TB configuration under test) · not applicable: a CPU render does not read from disk while the measurement runs; the unit carried a 1 TB TWSC SSD on PCIe 3.0 x4
Software / version / OS
Blender · 4.3 · Microsoft Windows 11 Pro
Power profile
Factory-set balanced mode (45 W), as the review states; performance (50 W) and silent (35 W) modes exist in the BIOS; no Windows power plan is named
Test conditions
Barbershop standard demo scene, CPU render backend as the table labels it (v4.3 Barbershop CPU). Samples and output resolution are those stored in the standard scene file

Editorial review checks the source and documentation; it does not certify the measurement or mean we tested the device ourselves.

Price history

GMKtec NucBox M6 Ultra · 32 GB RAM · 1 TB SSD

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New condition · US stores · USD · Selected configuration only. Prices exclude shipping and tax. Each price stays on the chart until that listing's next check, for at most 36 hours, the same window the store prices use. Out-of-stock, failed and missing checks leave gaps.

About this data6 references

Specs and any benchmark results come from the sources below. We haven't tested this Mini PC ourselves.

Sources

  1. GMKtec NucBox M6 Ultra — manufacturer specifications ↗
    • Manufacturer / specification source
    • Ports & displays · Reviewed Sep 12, 2026
    • Ethernet, Wi-Fi & Bluetooth · Reviewed Sep 12, 2026
    • RAM & storage upgrades · Reviewed Sep 12, 2026
    • Power supply & power limits · Reviewed Sep 12, 2026
    • Dimensions & weight · Reviewed Sep 12, 2026
    • Owner review source · Reviewed Sep 23, 2026
  2. Selected configuration ↗
    • Selected configuration
  3. Mini PC at a great price with AMD Ryzen power and USB4 versatility - GMKtec NucBox M6 Ultra review ↗
    • External benchmark · Reviewed Sep 23, 2026
    • Owner review source · Reviewed Sep 23, 2026
  4. GMKtec M6 Ultra Review ↗
    • Owner review source · Reviewed Sep 23, 2026
  5. GMKtec M6 Ultra "AMD Ryzen 5 7640HS" Mini PC Review - Mainstream Coverage Under $400 ↗
    • Owner review source · Reviewed Sep 23, 2026
  6. GMKtec NucBox M6 Ultra mini PC review ↗
    • Owner review source · Reviewed Sep 23, 2026

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