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Small black cube mini PC with fan grille and front ports

ASRock Industrial

ASRock Industrial 4x4 BOX-7735U barebone mini PC

SKU CH-00Z8-ATB1G MPN 4x4 BOX-7735U

Barebone mini PC with AMD Ryzen 7 7735U, supports 64 GB DDR5 4800, dual LAN up to 2.5 Gbps, Wi-Fi 6E, Bluetooth 5.2, quad display via HDMI 2.1 and three DP 1.4a outputs

  • ProcessorAMD Ryzen 7 7735U, 8Cores, Max Speed up to 4.75 GHz
  • Installed memoryNo Memory
  • RAM slots2 × 262Pin SO-DIMM
  • Supported memoryDDR5 4800
  • Maximum supported memory64 GB (32 GB per DIMM)
  • SATA ports1 x SATA 6.0Gb/s
  • 8-core Ryzen 7 7735U reaches 4.75 GHz for demanding workloads
  • Dual-channel DDR5 4800 supports up to 64 GB for smooth multitasking
  • Two USB4 Type-C ports deliver DP 1.4a video plus high-speed data
  • 5 GbE and 1 GbE with DASH enable fast, managed networking
  • Compact fanned chassis measures 110.0 x 117.5 x 47.85 mm

Barebone mini PC for embedded builds

The ASRock Industrial 4x4 BOX-7735U is a compact barebone system built around an AMD Ryzen 7 7735U processor with eight cores reaching 4.75 GHz. It targets integrators and developers who need a fan-cooled platform for industrial or commercial workloads. The chassis measures 110.0 x 117.5 x 47.85 mm and ships without memory or storage, so the builder chooses capacity.

Thermals, noise and 120 W power input

Active cooling handles the 7735U under sustained load, while the external 19 V 120 W adapter feeds the board. Two LAN ports — one at 2.5 Gbps and one at 1 Gbps with DASH — plus Wi-Fi 6E and Bluetooth 5.2 keep network traffic off the CPU. Integrated AMD Radeon graphics drive up to four displays without a discrete card, reducing total system heat.

Build integration: memory.

Two 262-pin SO-DIMM slots accept DDR5 4800 modules up to 64 GB total in dual-channel mode. A single M.2 Key M slot takes 2242, 2260 or 2280 SSDs on a PCIe Gen4 x4 link, while a SATA 6.0 Gb/s port adds a 2.5-inch drive option. Video exits through HDMI 2.1 and two USB4 Type-C ports with DP 1.4a, plus a front USB 3.2 Gen2 Type-A and combo audio jack.

How it compares

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

Price $419.99
Cheaper than about 68% of the 1,735 comparable items (median $564.99).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASRock Industrial
Model name4 × 4 BOX-7735U
Product colorBlack
Processor
ProcessorAMD Ryzen 7 7735U, 8Cores, Max Speed up to 4.75 GHz
Memory
Installed memoryNo Memory
RAM slots2 × 262Pin SO-DIMM
Supported memoryDDR5 4800
Maximum supported memory64 GB (32 GB per DIMM)
Dual-channel supportYes
Storage
SATA ports1 x SATA 6.0Gb/s
M.2 slots1 x M.2 (Key M, 2242/2260/2280) with PCIe Gen4 x4 for SSD
*M.2 Key M 2280(Supported by bracket)
Graphics
Built-in graphicsAMD Radeon Graphics
Audio & video
Built-in audioRealtek ALC233
Connectivity
LAN connectionLAN1: Realtek RTL8125BG with 10/100/1000/2500 Mbit/s
LAN2: Realtek RTL8111FPV with 10/100/1000 Mbit/s,support DASH function
Maximum network speed2.5 Gbit/s
Wi-Fi standard1 x Wi-Fi 6E 802.11ax
(M.2 Key E, 2230 PCIe x1, USB 2.0 for Wireless)
* WiFi throughput speed depends on actual environment and equipment
Bluetooth support5.2
Ports & slots
Front USB ports1 x USB 3.2 Gen2 (Type A)
2 x USB 4 (Type C, Supports DP 1.4a display output)
Front audio jacks1 (headphone & microphone jack)
HDMI ports1 x HDMI 2.1
DisplayPort connectors1 x DisplayPort 1.4a
Rear USB ports2 x USB 2.0
Ethernet port1 × 1 Gigabit LAN, 1 × 2.5 Gigabit LAN
Additional rear ports1 x DC Jack
Input12 V~19 V DC-In Jack
Size & build
Product dimensions1.88 in × 4.33 in × 4.63 in
Product weight2.2 lb (1 kg)
Shipping weight1.44 kg
Package size225 × 138 × 118 mm

Questions about this item

How do I install DDR5 SO-DIMM modules in the 262-pin slots, and what is the common mistake?

Insert each stick at an angle until the gold contacts disappear, then press down until both side clips click; the mistake is stopping when the stick feels seated but before the clips lock, which leaves the module loose.

Which parts will need replacement first during long-term operation?

The internal cooling fan is the only moving component; plan to clean its heatsink fins annually and replace the fan assembly if bearing noise appears.

What thermal limit appears first when the Ryzen 7 7735U runs sustained workloads in the 47.85 mm chassis?

The CPU will hit its thermal ceiling and reduce clock speeds once the fan reaches maximum RPM and the heatsink can no longer dissipate the 120 W adapter's worth of heat.

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