GMKtec NucBox K12 Ryzen 7 H 255

Zen 4 power, limitless expansion and professional-grade connectivity are packed into a chassis measuring just 154 × 151 × 73.6 mm. GMKtec's new mini PC is powered by an 8-core AMD Ryzen 7 H 255 processor, Radeon 780M GPU and supports up to 128GB of DDR5 along with 24TB in three M.2 PCIe 4.0 slots, all cooled by a dual-fan vapour chamber. This version does not include RAM or HDD disk.

Zen 4 performance for creators and gamers

The Ryzen 7 H 255 (8C/16T, up to 4.9 GHz) achieves a TDP of 70 W and is supported by the Radeon 780M (12 CU RDNA 3) to move AAA titles at low-medium settings or accelerate multimedia workflows with integrated AI. Three power profiles allow you to prioritise silence or speed depending on the task.

Mass storage and eGPU expansion

• 3× M.2 PCIe 4.0: two x2 + one x4, up to 24TB total.
• OCuLink (8 GT/s) and USB4 to connect an external GPU and gain fps in demanding games or rendering.

Professional and multi-monitor connectivity

Includes dual 2.5G LAN, Wi-Fi 6E, Bluetooth 5.2 and HDMI 2.1 + DP 1.4 + USB-C outputs capable of driving up to four simultaneous displays at 8K 120 Hz, ideal for trading, editing or digital signage.

Thermal design and compact form factor

The vapour chamber with smart speed fans keeps the processor at bay even at full performance, while the "floating style" casing with RGB top lighting integrates seamlessly into desktop or VESA brackets.

Technical Specifications GMKtec NucBox K12 Ryzen 7 H 255 (Barebone)

• Brand: GMKtec
• Model: NucBox K12
• Processor: AMD Ryzen 7 H 255, 8 cores, 16 threads, 16 Mb, up to 4.9 Ghz
• Graphics: AMD Radeon 780M Graphics
• Wireless connection:
  • WiFi 6E 2.4/5GHz
  • Bluetooth 5.2
• Features:
  • Efficient cooling system
  • RGB light effects
  • Quad HDMI+DP+USB 4.0+USB-C quad display
  • Oculink expansion
• Interface:
  • 1 x DP v1.4
  • 1 x HDMI 2.1
  • 1 x USB Type-C
  • 1 x USB 4.0
  • 2 x USB 3.2 Gen2 Type A
  • 1 x USB 3.2 Gen2 Type C
  • 1 x USB 2.0
  • 1 x Oculink PCle 4.0°4
  • 2 x RJ45 LAN 2 (2.5 Gbps)
  • 1 x 3.5 mm Audio
• Operating system: None
• Colour: Black

Box Contents:

• 1 x GMKtec NucBox K12 Ryzen 7 H 255
• 1 x Power cable
• 1 x HDMI cable
• 1 x VESA bracket with screws
• 1 x User manual