GMKtec K12 Mini PC AMD Ryzen™ 7 H 255
The GMKtec K12 is a mini PC powered by an AMD Ryzen 7 H 255 processor (8 cores, 16 threads, up to 4.9GHz) with Radeon 780M graphics. It supports up to 96GB DDR5-5600 memory, up to 24TB storage via three M.2 PCIe 4.0 slots, and quad display output. Connectivity includes Wi-Fi 6E, Bluetooth 5.2, dual 2.5G Ethernet, USB4, HDMI 2.1, and a PCIe 4.0 OCulink port. It runs Windows 11 Pro.
Pros
- +8-core 16-thread Ryzen H 255
- +Radeon 780M graphics
- +Dual-channel DDR5 memory
- +Supports up to 96GB RAM
- +Three M.2 PCIe 4.0 slots
- +OCuLink PCIe Gen4 port
Cons
- −No SD card slot
- −OCuLink does not support hot-plugging
| Model | GMKtec NUCBOX K12 |
| Processor | AMD Ryzen™ 200 Series Processor, 8 Cores, 16 Threads Zen 4 Architecture Base Frequency 3.8GHz, Max Boost up to 4.9GHz 8MB L2 Cache / 16MB L3 Cache |
| Processor Model | AMD Ryzen™ 7 H 255 |
| Processor Technology | TSMC 4nm FinFET |
| Processor Package | TSMC 4nm FinFET |
| Graphics | AMD Radeon™ 780M Graphics 12 Cores, up to 2600MHz |
| Memory | 2 × DDR5 SO-DIMM Slots Dual-Channel 32GB (16GB × 2) standard configuration DDR5-5600 Memory Supports up to 96GB |
| Memory Slots | 2 slots, max 96GB |
| Storage | 512GB / 1TB SSD options |
| Storage Expansion | 3 × M.2 2280 PCIe 4.0 SSD Slots 1 × PCIe 4.0 ×4 slot + 2 × PCIe 4.0 ×2 slots Supports up to 24TB total storage |
| Display Support | Quad display output via HDMI 2.1 + DisplayPort 1.4 + USB4 + USB Type-C Supports simultaneous multi-display output |
| Wireless | Wi-Fi 6E (RZ616, up to 2.4Gbps) Bluetooth 5.2 Dual 2.5G Ethernet LAN (Realtek 8125BG) |
| Bluetooth | Bluetooth 5.2 |
| Ethernet | Dual 2.5G Ethernet LAN (Realtek 8125BG) |
| I/O Ports | 1x USB4, 1x HDMI 2.1, 1x DP 1.4, 1x OCuLink, 1x USB-C 3.2 Gen2, 3x USB-A 3.2 Gen2, 2x USB-A 2.0, 2x RJ45 2.5G, 2x 3.5mm combo jack, 1x DC IN |
| Front I/O | Audio: 1 × 3.5mm Combo Jack USB-C: 1 × USB 3.2 Gen2 Type-C (PD / DP / Data) USB-A: 2 × USB 3.2 Gen2 USB-A: 1 × USB 2.0 Power Button: 1 × Power Button with White LED Indicator Reset: 1 × Clear CMOS Button |
| Rear I/O | Audio: 1 × 3.5mm Combo Jack USB4: 1 × USB4.0 Full-Function Port HDMI: 1 × Standard HDMI 2.1 DisplayPort: 1 × DP 1.4 (DP++) OCulink: 1 × PCIe Gen4 ×4 OCulink Port USB-A: 1 × USB 3.2 Gen2 + 1 × USB 2.0 LAN: 2 × RJ45 2.5G Ethernet Power: 1 × DC IN (5.5 × 2.5mm) |
| Dimensions | 154 × 151 × 73.6 mm |
| Weight | Approx. 920 g |
| Color / Finish | Iron Gray |
| Form Factor | Mini PC (NUC form factor) |
| Power | Built-in coin cell battery DC Power Adapter 19V / 6.32A, 120W |
| Power Options | US, EU, UK, AU |
| Cooling | Dual heat pipe cooling with CPU fan and DDR/SSD cooling fan, RGB lighting |
| Operating System | Windows 11 Pro |
| Operating System Options | US, EU, UK, AU |
| Audio | 2 × 3.5mm combo jack (front and rear) |
| Expansion Slots | 3 × M.2 2280 PCIe 4.0 (1x PCIe 4.0 x4, 2x PCIe 4.0 x2) |
| Environmental | 0°C – 40°C |
| Certifications | CCC, CE, FCC, RoHS, MIC, CEC, China Energy Label, UL Report |
| Package Contents | User Manual Warranty Card Power Adapter HDMI Cable VESA Mount Bracket |
| Features | 1 × System Fan Control Button Supports lighting on/off control and multiple RGB lighting modes | The OCulink port does not support hot-plugging. Please connect or disconnect the cable only when the device is powered off. | 14 Languages Supported (Default English): Simplified Chinese, Traditional Chinese, French, Dutch, Italian, Spanish, Korean, Japanese, German, Hebrew, Russian, Portuguese, Arabic | OCulink Port | 3x M.2 2280 PCIe 4.0 | 2x 2.5G LAN + Wi-Fi 6E + BT 5.2 |
| Overview | GMKtec K12 Mini PC. Powered by AMD Ryzen 7 H 255! Co-created with Red Dot Award Winner Crafted with Passion. GMKtec Gaming Mini PC AMD Ryzen 7 H 255 (Upgraded 8745HS) 32GB DDR5 1TB SSD, Desktop Computer 3XM.2 2280 Expansion, Oculink, Dual NIC 2.5G, HDMI 2.1, USB4 K12 |
| Warranty | 1-Year Limited Warranty |
| Configurations | Barebone (No DDR & SSD & OS) | 32GB RAM + 1TB SSD | 64GB RAM + 1TB SSD |
Specs on this page may not be 100% accurate — please verify with the manufacturer.
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