GMKtec
GMKtec M6 Ultra Gaming Mini PC Ryzen 7640HS (Upgraded 6800H)
Bottom line: The GMKtec M6 Ultra Gaming Mini PC Ryzen 7640HS: Ryzen 5 7640HS: 6 Zen 4 cores, 12 threads, up to 5.0GHz boost; main trade-off: base SSD is 512GB PCIe 3.0, not the faster Gen4 the board supports.
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Pros & Cons
Pros
- ✓ Ryzen 5 7640HS: 6 Zen 4 cores, 12 threads, up to 5.0GHz boost
- ✓ Dual 2.5GbE RJ45 NICs — ready for pfSense, Untangle, or a home server
- ✓ Radeon 760M iGPU with AV1, HEVC and AVC hardware encode/decode
- ✓ Triple display: 8K@60Hz via USB4 plus dual 4K@60Hz on HDMI and DP
- ✓ Expandable to 128GB DDR5 with dual SSD slots up to 8TB PCIe 4.0
Cons
- ✗ Base SSD is 512GB PCIe 3.0, not the faster Gen4 the board supports
- ✗ Ships with 16GB DDR5; RAM and storage upgrades not included
- ✗ Radeon 760M suits moderate gaming only, not AAA at high settings
- ✗ Only a 1-year limited warranty from GMKtec
SpecPicks Verdict
SpecPicks scored GMKtec M6 Ultra Gaming Mini PC Ryzen 7640HS using a rating × review-volume × price-fit model applied to published specs and reviews across the home ai / computer lab category. GMKtec's home ai / computer lab lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for home ai / computer lab of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- VALUE & PERFORMANCE MINI PC - GMKtec Nucbox M6 Ultra Series is equipped with the powerful AMD Ryzen 5 7640HS processor. This CPU is an upper mid-range processor (APU) of the Phoenix product family. It has 6 SMT-enabled Zen 4 cores (12 threads) running at 4.3 GHz base speed to turbo boost 5.0 GHz.With a TDP Boost of 45W-60W, the Ryzen 7640HS CPU is more energy efficient and delivers a 30% Performance increase over previous AMD Ryzen 7 6800H, 6600U.
- 16GB DDR5 RAM & 512GB PCIe SSD - Installed with DDR5 16GB RAM SO-DIMM Dual Channel (2x8GB), the Nucbox M6 Ultra mini pc support expansion to 128GB RAM. Featured with 512GB M.2 2280 PCIe 3.0 SSD, support dual slot expansion to PCIe 4.0 8TB SSD. (Upgrades not included)
- GAMING PC - The Radeon 760M iGPU has 8 CUs (512 shaders) running at up to 2,600 MHz. This desktop computer can play moderate gaming at a steady FPS, it also HW-encodes and HW-decodes the most widely used video codecs such as AV1, HEVC and AVC.
- DUAL NIC LAN 2.5G RJ45 - Fast Network Speeds: Enjoy up to 2500Mbps data transmission speed without worrying about lagging. Ideal for working, gaming, and surfing the internet. Great for Untangle, Pfsense or as a server office PC.
- TRIPLE 4K DISPLAY - Unlock unparalleled productivity with support for three simultaneous displays, including a stunning 8K@60Hz via USB4, plus 4K@60Hz through both HDMI 2.0 and DisplayPort, transforming your workspace into a command center for multitasking and immersive entertainment.
- FAST INTERNET WiFi 6E + BT5.2 CONNECTION - Experience next-generation WiFi 6E for ultra-fast, low-latency internet on 2.5G/5G bands, paired with Bluetooth 5.2 for instant peripheral connections. BT5.2 allowing you more quickly to connect other wireless devices (headset, mouse, keyboard, etc.) Interface features 3*USB3.2 (Gen2) ports, 1*USB2.0 ports, 1*HDMI 2.0 port(4K@60Hz), 1*USB 4.0 port(PD/DP/DATA), 1*DP Port, 1*Audio 3.5mm (HP&MIC), 1*DC Power Port.
Full Specifications
| Brand | GMKtec |
|---|---|
| Color | Black |
| Turbo | Yes |
| Weight | 2.5g |
| RAM Type | DDR5 RAM |
| CPU Model | AMD R Series |
| CPU Speed | 4.5 GHz |
| Cache Size | 16 GB |
| Model Name | M6 Ultra |
| Model Year | 2025 |
| Resolution | 4K |
| Style Name | 7640HS |
| Unit Count | 1 Count |
| Aspect Ratio | 16:9 |
| Connectivity | Bluetooth, USB, WiFi |
| Memory Speed | 4800 MHz |
| Model Number | M6 Ultra |
| Video Output | DisplayPort, HDMI, USB4 |
| Compatibility | PC |
| Built-In Media | GMKtec Nucbox M6 Ultra AMD Ryzen 5 7640HS Mini PC Computer, HDMI Cable, Power Supply & Cable, User Manual, VESA Mount and Screws |
Ready to buy?
GMKtec M6 Ultra Gaming Mini PC Ryzen 7640HS (Upgraded 6800H) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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