GMKtec NucBox K12
The 8-core Ryzen 7 H 255 and Radeon 780M iGPU deliver strong AVX512-capable compute and quad 4K/8K display support in a 0.82kg chassis. An Oculink port provides PCIe 4.0 x4 bandwidth for eGPU setups, while dual 2.5GbE LAN and three M.2 slots offer unusual server-grade expandability for a mini PC. This system is best for developers and home-lab enthusiasts who need a compact, multi-display workstation with high-speed networking and storage flexibility.
CPU AMD Ryzen 7 H 255
RAM 32 GB
Storage 1 TB
GPU AMD Radeon 780M
form factor mini
psu w 120
OS OS Pro
71 Overall Score
Price ¥193,319
Snapshot
Pros & Cons
Pros
- Strong social proof (96th percentile) 96th
- Strong port selection (88th percentile) 88th
- Strong ram (83rd percentile) 83rd
- Strong storage (73rd percentile) 73rd
Cons
- Below average reliability (12th percentile)
The proof
Performance
Specifications
Full Specifications
Processor
| CPU | AMD Ryzen 7 H 255 |
| Cores | 8 |
| Frequency | 4.9 GHz |
| L3 Cache | 16 MB |
Graphics
| GPU | AMD Radeon 780M |
| Type | Integrated |
| VRAM Type | Shared |
Memory & Storage
| RAM | 32 GB |
| RAM Generation | DDR5 |
| Storage | 1 TB |
| Storage Type | NVMe SSD |
Build
| Form Factor | mini |
| PSU | 120 |
| Weight | 0.8 kg / 1.8 lbs |
Connectivity
| USB-C Ports | 2 |
| USB Ports | 5 |
| Thunderbolt | USB4.0 x 1 |
| HDMI | 1x HDMI 2.1 |
| DisplayPort | 1x DisplayPort 1.4 |
| Wi-Fi | Wi-Fi 6E |
| Bluetooth | Bluetooth 5.2 |
| Ethernet | 2.5GbE |
System
| OS | OS Pro |
vs Competition
| Spec | GMKtec NucBox K12 | HP OMEN GT22-3080 | MSI Infinite ZS 9NVR-1482US | iBUYPOWER Element Pro EPWA7N57T01 | Corsair VENGEANCE i5100 | CLX Horus TGMHORRTU5705WM |
|---|---|---|---|---|---|---|
| CPU | AMD Ryzen 7 H 255 | Intel Core Ultra 7 265K | AMD Ryzen 9 9900X | AMD Ryzen 7 9800X3D | Intel Core i9 14900KF | Intel Core Ultra 9 285K |
| RAM (GB) | 32 | 32 | 32 | 32 | 32 | 192 |
| Storage (GB) | 1024 | 2048 | 2048 | 2000 | 2048 | 4096 |
| GPU | AMD Radeon 780M | NVIDIA GeForce RTX 5080 | NVIDIA GeForce RTX 5070 Ti | NVIDIA GeForce RTX 5070 Ti | NVIDIA GeForce RTX 5080 | NVIDIA GeForce RTX 5080 |
| Form Factor | mini | mid-tower | mid-tower | mid-tower | mid-tower | mid-tower |
| Psu W | 120 | 850 | 750 | 750 | 1000 | 1000 |
| OS | OS Pro | Windows 11 Pro | Windows 11 Pro | Windows 11 Home | Windows 11 Home | Windows 11 Home |
| Compare | Compare | Compare | Compare | Compare |
| Product | CPU | GPU | RAM | Ports | Storage | Reliability | Social Proof |
|---|---|---|---|---|---|---|---|
| GMKtec NucBox K12 | 63.7 | 56.2 | 82.5 | 87.6 | 73.1 | 11.8 | 96.2 |
| HP OMEN GT22-3080 Compare | 96 | 89 | 78.8 | 93.3 | 91.6 | 70.6 | 87.3 |
| MSI Infinite ZS 9NVR-1482US Compare | 92.5 | 86.4 | 87.6 | 90.2 | 91.6 | 38 | 87.1 |
| iBUYPOWER Element Pro EPWA7N57T01 Compare | 79.5 | 86.4 | 78.8 | 91.8 | 87.1 | 27.6 | 91.8 |
| Corsair VENGEANCE i5100 Compare | 94.2 | 89 | 87.6 | 97.3 | 91.6 | 32.7 | 20.1 |
| CLX Horus TGMHORRTU5705WM Compare | 97.5 | 89 | 99.3 | 99.8 | 98.4 | 11.8 | 21.1 |
Price
Value & Pricing
From ¥193,319
Amazon.co.jp 1 offer From ¥193,319
We started tracking prices for this product on Jul 3, 2026. The chart appears once we have more data.
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
