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Compact black barebone mini PC with no memory or storage installed

ASRock Industrial

ASRock Industrial NUC BOX-255H barebone mini PC, Core Ultra 7 255H

SKU CH-9F5M-HFMEB MPN NUC BOX-255H

Barebone mini PC with Intel Core Ultra 7 255H, dual 2.5Gbps LAN, Wi-Fi 6E, Bluetooth 5.3, dual DDR5 6400 SO-DIMM slots up to 96GB, two M.2 PCIe Gen4x4 SSD slots, Intel Arc graphics, HDMI 2.1.

  • ProcessorIntel Core Ultra 7 255H
  • Wi-Fi standardWi-Fi 6E
  • AI capabilityAI Accelerated
  • Installed memoryNo Memory
  • RAM slots2 × 262Pin SO-DIMM
  • Supported memoryDDR5 6400

CPU Type Intel Core Ultra 7 255H

Model 2 Ethernet Ports

  • Intel Core Ultra 7 255H processor drives AI-accelerated workloads
  • Dual-channel DDR5 6400 memory support up to 96 GB capacity
  • Two M.2 slots with PCIe Gen4x4 for high-speed SSD storage
  • Dual 2.5 Gbps Intel LAN plus Wi-Fi 6E and Bluetooth 5.3 connectivity
  • Front USB4 Thunderbolt 4 and USB 3.2 Gen2x2 with DisplayPort video output

Compact AI mini PC for custom builds

The ASRock Industrial NUC BOX-255H is a barebone mini PC built around the Intel Core Ultra 7 255H processor with integrated Intel Arc graphics and AI acceleration. It targets builders who want a small footprint for gaming, content creation or edge workloads and prefer to choose their own DDR5 memory and storage.

Straightforward assembly with two memory slots

Installing components means opening the chassis, inserting up to two 262-pin SO-DIMM modules and fitting M.2 drives into the Key M slots. The board supports DDR5 6400 in dual-channel mode up to 96 GB total. No memory or drives are included, so the builder must supply compatible modules and screws for the 2242 and 2280 form factors.

Verify DDR5 SO-DIMM and M.2 Key M compatibility

Before ordering, confirm you have DDR5 6400 SO-DIMMs and M.2 Key M SSDs in 2242 or 2280 lengths. The system provides one SATA 6.0 Gb/s port, two HDMI 2.1 outputs, USB4 with DP 2.1, USB 3.2 Gen2x2 Type-C with DP 1.4a, dual 2.5 Gbps LAN, Wi-Fi 6E and Bluetooth 5.3. Buyers needing pre-installed RAM or a 2.5-inch drive bay should look elsewhere.

How it compares

Measured against everything we stock in Mini PC Barebone Systems, at today’s prices. Recalculated every night.

Price $475.99
Cheaper than about 62% of the 1,735 comparable items (median $564.99).

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Specifications

Product
Brand nameASRock Industrial
Model nameNUC BOX-255H
Product colorBlack
Processor
ProcessorIntel Core Ultra 7 255H
Memory
Installed memoryNo Memory
RAM slots2 × 262Pin SO-DIMM
Supported memoryDDR5 6400
Maximum supported memory96 GB (48 GB per DIMM)
Dual-channel supportYes
Storage
Installed storageNo Hard Drive
SATA ports1 x SATA 6.0Gb/s
M.2 slots1 x M.2 (KEY M, 2242/2280) with PCIe Gen4 × 4 for SSD
1 x M.2 (KEY M, 2242) with PCIe Gen4 × 4 for SSD
Graphics
Built-in graphicsIntel Arc Graphics
Audio & video
Built-in audioRealtek ALC256
Connectivity
LAN connectionLAN1: Intel I226LM
LAN2: Intel I226 V
Maximum network speedDual 2.5 Gbit/s
Wi-Fi standard802.11ax
Bluetooth support5.3
Ports & slots
Front USB ports1 x USB 3.2 Gen2 (Type A)
1 x USB4/Thunderbolt 4 (Supports DP 2.1 display output)
1 x USB3.2 Gen2 × 2 (Type-C, Supports DP1.4a display output)
Front audio jacks1 (headphone & microphone jack)
HDMI ports2 x HDMI 2.1 TMDS
Rear USB ports2 x USB 3.2 Gen 2 (Type-A)
Ethernet port2 × 2.5 Gigabit LAN
Input12 V~24 V DC-In Jack
Power
Power supply19 V/120 W
Size & build
Product dimensions4.63 in × 4.33 in × 1.93 in
Product weight2.2 lb (1 kg)
Shipping weight1.70 kg
Package size241 × 155 × 132 mm
More details
AI capabilityAI Accelerated

Other versions of this model

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Questions about this item

How do I confirm the Intel Arc Graphics are active after installing memory and storage?

Connect a display to an HDMI 2.1 or USB-C port, power on, enter the UEFI to verify the Intel Core Ultra 7 255H is detected, then check Device Manager in Windows for the Arc Graphics driver.

Which parts are missing from the barebone and must be purchased separately?

The unit ships without DDR5 6400 SO-DIMMs and without any M.2 or SATA drive; you must add up to 96 GB of memory and at least one SSD for the operating system.

Should I choose 48 GB or 96 GB total memory for the dual-channel 262-pin slots?

Both capacities run at DDR5 6400 in dual-channel; 48 GB (2 × 24 GB) covers most workloads, while 96 GB (2 × 48 GB) is only needed for heavy multitasking or local AI tasks.

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