GMKtec NucBox K12 AMD Ryzen™ 7 H 255 Mini PC
- CPU & Graphics: AMD Ryzen™ 7 H 255 processor with 8 cores, 16 threads, boost speeds of up to 4.9 GHz and AMD Radeon™ 780M graphics
- Memory & Storage: 32 GB DDR5 dual-channel memory, upgradeable up to 96 GB, with 512 GB or 1 TB PCIe 4.0 SSD storage and support for up to 24 TB across 3 × M.2 slots
- Connectivity: 1 × HDMI 2.1, 1 × DisplayPort 1.4, 1 × USB4, 1 × USB-C with 4-display support, Wi-Fi 6, Bluetooth 5.2 and dual 2.5 Gigabit LAN
- Ideal For: Home office, multitasking, productivity and everyday desktop performance
Summer Sale
Use the code below at checkout while stock lasts.
Save £15 per unit — final price updates at checkout.
Starts in
Limited-time offer. While stock lasts.
GMKtec Nucbox K12
AMD Ryzen™ 7 H 255
8 Cores / 16 Threads, Zen 4, 3.8GHz (Max. 4.9GHz), 8MB L2 + 16MB L3 cache, TDP 35–54W (Max. 70W Design)
AMD Radeon™ 780M, 12 Core @ 2600 MHz
Storage up to 24TB
512GB / 1TB SSD (PCIe 4.0), expandable up to 24TB via 3×M.2 (2×PCIe 4.0x2, 1×PCIe 4.0x4)
Dual-Channel DDR5 @5600 MT/s
32GB (2×16GB) @ 5600 MT/s, Max. 96GB
4 Screens 8K Display
1× HDMI 2.1, 1× DP 1.4, 1× USB4, 1× Type-C (supports simultaneous 4-screen output)
Oculink Port
PCle Gen4 x4,Supports external RTX 4060 GPU
WIFi 6E+BT5.2
WiFi 6E (RZ616), up to 2.4 Gbit/s at 160MHz
USB4.0 *1
AMD Ryzen™ 7 H 255
8 Cores / 16 Threads, Zen 4, 3.8GHz (Max. 4.9GHz), 8MB L2 + 16MB L3 cache, TDP 35–54W (Max. 70W Design)
AMD Radeon™ 780M, 12 Core @ 2600 MHz
Storage up to 24TB
512GB / 1TB SSD (PCIe 4.0), expandable up to 24TB via 3×M.2 (2×PCIe 4.0x2, 1×PCIe 4.0x4)
Dual-Channel DDR5 @5600 MT/s
32GB (2×16GB) @ 5600 MT/s, Max. 96GB
4 Screens 8K Display
1× HDMI 2.1, 1× DP 1.4, 1× USB4, 1× Type-C (supports simultaneous 4-screen output)
Oculink Port
PCle Gen4 x4,Supports external RTX 4060 GPU
WIFi 6E+BT5.2
WiFi 6E (RZ616), up to 2.4 Gbit/s at 160MHz
USB4.0 *1
Powerful core, new world of gaming
AMD Ryzen™ 7 H 255
Zen 4, 3.8GHz (Max. 4.9GHz)
8 Cores / 16 Threads, TDP 35–54W (Max. 70W Design)
8MB L2 + 16MB L3 Cache
Cinebench R23 Multi-Core Score
AMD Ryzen™ 7 H 255
Intel Core i5-13500H
AMD Ryzen 7 7735HS
Maximum Storage & Speed
With 128 GB DDR5 5600 MT/s (expandable up to 128 GB) and a 1 TB PCIe 4.0 SSD (supports up to 24 TB), the system offers enormous performance. Thanks to 2 × M.2 PCIe 4.0 x2 and 1 × M.2 PCIe 4.0 x4 slots, fast upgrades are possible at any time.
128GB (64GBx2) DDR5 5600MT/S Removable memory, supports up to 128GB
1TB PCle 4.0 SSD(Up to 24TB supported)
2*M.2 2280 PCIE4.0x2 SSD
1*M.2 2280 PCIE4.0x4 SSD
Gaming-ready network configuration
Wi-Fi 6E – up to 3× faster than Wi-Fi 5
Wi-Fi 6E outperforms Wi-Fi 6 with the new 6GHz band, support for up to 320MHz channels, delivering faster, more stable data speeds while staying compatible with Wi-Fi 6/5 devices.
WiFi 6E
Wifi 5
Dual LAN (RJ45) – Network connections, compatible with Linux, Ubuntu, ESXi and VMware
DUAL 2.5G HIGH SPEED ETHERNET
Read/Write Speed
2.5Gbps LAN
1000MbpS LAN
Specification
General
Zen 4 Architecture
Base Frequency 3.8GHz, Max Boost up to 4.9GHz
8MB L2 Cache / 16MB L3 Cache
12 Cores, up to 2600MHz
Dual-Channel 32GB (16GB × 2) standard configuration
DDR5-5600 Memory
Supports up to 96GB
1 × PCIe 4.0 ×4 slot + 2 × PCIe 4.0 ×2 slots
Supports up to 24TB total storage
Supports simultaneous multi-display output
Bluetooth 5.2
Dual 2.5G Ethernet LAN (Realtek 8125BG)
DC Power Adapter 19V / 6.32A, 120W
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
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)
Supports lighting on/off control and multiple RGB lighting modes
Please connect or disconnect the cable only when the device is powered off.
Warranty Card
Power Adapter
HDMI Cable
VESA Mount Bracket
Frequently Asked Questions
A: Yes. We currently ship across the United Kingdom, mainly to mainland UK addresses. Some remote or special regions may require additional review.
A: Orders placed on our UK store are currently shipped from our warehouse and fulfilment partners in mainland China.
A: Orders are usually processed within 1–2 business days, and standard delivery to the UK typically takes around 7–14 business days.
A: Yes. We currently offer free standard shipping unless otherwise stated on the product page or at checkout.
A: In some cases, customs or courier clearance charges may be requested by the carrier or customs authority before delivery, depending on the shipping route and customs process.
A: Please follow the carrier’s instructions to complete the clearance process promptly and avoid delivery delays or parcel return. Keep your payment proof and the customs or courier receipt, then contact our support team with your order number and relevant documents. Eligible cases will be reviewed and handled accordingly.
A: If you purchase from our UK store as a consumer, you have the right to cancel your order within 14 days of receiving the goods. For change-of-mind returns, the customer is generally responsible for return shipping unless otherwise agreed.
A: Yes. GMKtec provides a 1-year limited warranty to the original purchaser from the date of order placement.
