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Compact gunmetal black mini PC with RGB lighting

GMKtec

GMKtec K12 barebone mini PC Ryzen 7 H 255 32GB DDR5 512GB

SKU CH-JD0D-J3EFJ MPN K12

Compact barebone mini PC with a Ryzen 7 H 255 processor, 32 GB DDR5 memory, 512 GB storage and triple M.2 expansion up to 24 TB

  • ColorGunmetal Black
  • Form FactorMINI PC
  • CPU TypeAMD Ryzen 7
  • CPU SocketTSMC 4nm FinFET
  • CPU Cores8-Core
  • North BridgeIntegrated in AMD Ryzen 7 H 255 SoC
  • 8-core Ryzen 7 H 255 reaches 4.9 GHz for fast multitasking
  • Radeon 780M integrated graphics drives 8K output and FSR gaming
  • 32 GB DDR5 5600 MT/s dual-channel memory handles heavy workloads
  • Three M.2 2280 PCIe 4.0 slots support up to 24 TB total storage
  • Dual 2.5 GbE LAN plus WiFi 6E and BT 5.2 give flexible connectivity

Compact barebone for gaming and creative work

The GMKtec K12 barebone mini PC arrives with a Ryzen 7 H 255 processor, 32GB of DDR5 5600 MT/s memory and a 512GB PCIe 4.0 NVMe SSD. Integrated Radeon 780M graphics drive up to four displays at 8K resolution. An Oculink port enables external GPU expansion, while dual 2.5GbE LAN and WiFi 6E handle networking.

Who this suits and who should look elsewhere

Buyers wanting a small, quiet system for 1080p or 1440p gaming, content creation or multi-monitor productivity will appreciate the pre-installed Windows 11 Pro and 35dB cooling. The 120W power adapter and VC thermal design support sustained loads. Users needing more than 32GB of RAM, discrete graphics performance without an eGPU, or storage beyond 24TB across the three M.2 slots should consider other platforms.

Three M.2 2280 slots with 24TB total capacity

Storage expansion is the decisive specification: three PCIe 4.0 M.2 2280 slots accept up to 24TB combined, with one slot wired for x4 and two for x2 bandwidth. The included 512GB drive occupies one slot, leaving two open for additional NVMe SSDs. This density lets the mini PC serve as a compact workstation or media server without external enclosures.

Points forts

  • 8-core Ryzen 7 H 255 reaches 4.9 GHz for fast multitasking
  • Radeon 780M integrated graphics drives 8K output and FSR gaming
  • 32 GB DDR5 5600 MT/s dual-channel memory handles heavy workloads
  • Three M.2 2280 PCIe 4.0 slots support up to 24 TB total storage
  • Dual 2.5 GbE LAN plus WiFi 6E and BT 5.2 give flexible connectivity

Caractéristiques

BrandGMKtec
SeriesK12
ModelK12 32+512
Part NumberK12 32+512
ColorGunmetal Black
Form FactorMINI PC
CPU TypeAMD Ryzen 7
CPU SocketTSMC 4nm FinFET
CPU Cores8-Core
North BridgeIntegrated in AMD Ryzen 7 H 255 SoC
South BridgeIntegrated in AMD Ryzen 7 H 255 SoC
Memory installed32GB (2x16GB) DDR5 5600 MT/s
Memory slot2 x SO-DIMM Slots
Memory Type SupportedDDR5 5600 MT/s
Dual Channel Memory SupportedYes
Other3x M.2 2280 PCIe 4.0 Slots (Max 24TB Total Storage)
Storage Installed512GB PCIe 4.0 M.2 2280 NVMe SSD
M.2 Slot3x M.2 2280 PCIe 4.0 Slots (Max 24TB Total Storage)
Integrated GraphicsAMD Radeo 780M
Onboard AudioRealtek HD Audio Codec
ChannelStereo (2-channel)
LANDual 2.5GbE Ethernet (Realtek RTL8125BG)
Max LAN Speed2.5Gbps per port
Wireless LANWiFi 6E (RZ616, up to 2.4Gbps)
WiFi GenerationWi-Fi 6E
BluetoothBluetooth 5.2
Front USB3 Ports (1x USB3.2 Gen2 Type-C, 2x USB3.2 Gen2 Type-A, 1x USB2.0 Type-A)
Front Audio Ports1 x 3.5mm Combo Audio Jack
Other Front Ports1x Power Button, 1x Reset Button (Clear CMOS)
HDMIStandard HDMI 2.1 (Supports 8K@120Hz)
DisplayPortDP 1.4 (Supports 8K@120Hz)
Rear USBTotal: 5 Ports (1x USB4, 1x USB3.2 Gen2, 2x USB3.2 Gen1, 1x USB2.0)
RJ45Dual 2.5GbE Ethernet (Realtek RTL8125BG)
Rear Audio Ports1 x 3.5mm Combo Audio Jack
Other Rear Ports1 x OCulink (PCIe 4.0 x4)
Internal Connectors2 x M.2 2280 PCIe 4.0 Slots (1x for SSD, 1x for SSD/Extension)
Input100-240V AC, 50/60Hz (Universal Input)
Power Supply120W DC Output (19V 6.32A)
Dimensions15.4 x 15.1 x 7.36 cm
Weight0.92kg
FeaturesBuilt-in CMOS Battery, RGB Lighting Modes, Fan Speed Adjustment
PackagingRetail Box (Includes Mini PC, Power Adapter, HDMI Cable, User Manual)

Questions sur cet article

How do I install extra M.2 2280 SSDs in the three PCIe 4.0 slots?

Open the chassis, insert each drive at an angle into the M.2 2280 slot, secure with the screw, and close the case; the step often missed is tightening the screw so the drive makes full contact with the thermal pad.

What maintenance will the dual-fan VC cooling system need later?

Blow dust from the fan intakes and heatsink fins every few months; the thermal pads on the DDR5 and SSD areas should be checked when drives are swapped.

At what temperature does the Ryzen 7 H 255 hit its thermal limit under sustained load?

The CPU TDP scales up to 70 W and the cooling is rated to 35 dB; sustained heavy workloads will push the SoC toward its 100 °C junction limit before throttling begins.

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