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Green Mini-ITX server motherboard with dual 10G RJ45 ports, four DDR4 slots and PCIe x16 slot

ASRock Rack

ASRock Rack EPYC3251D4I-2T server motherboard 8-core EPYC 3251 dual 10G LAN

SKU CH-ZGW4-B8232 MPN EPYC3251D4I-2T

Mini-ITX server board with embedded 8-core EPYC 3251, four DDR4 ECC slots up to 128 GB, dual 10 GbE LAN and dedicated IPMI port

  • CPU TypeSupport AMD EPYC 3251 (8 cores, 16 threads)
  • Number of Processor Support1
  • North BridgeSoc
  • Number of DDR4 Slots4 x 288-pin
  • DDR4 StandardECC / UDIMM: 2133 / 2400 / 2666 MHz RDIMM: 2133 / 2400 / 266
  • Maximum Memory SupportedMax. Capacity per DIMM ECC UDIMM, RDIMM, LRDIMM: up to 128GB
  • 8-core AMD EPYC 3251 SoC delivers 16-thread performance for dense workloads
  • Dual 10 GbE Intel X550-AT2 ports provide high-throughput networking
  • Four DDR4 slots support ECC UDIMM, RDIMM and LRDIMM up to 128 GB
  • M.2 slot accepts PCIe 3.0 x4 or SATA drives up to 22110 form factor
  • Mini-ITX 6.7" square fits compact 1U and embedded chassis

Mini-ITX server board with embedded EPYC 3251

The ASRock Rack EPYC3251D4I-2T is a Mini-ITX server motherboard built around the AMD EPYC 3251 system-on-chip. It delivers eight cores and sixteen threads in a 6.7" x 6.7" footprint. The board targets embedded and edge deployments that need server-grade reliability and dual 10 GbE connectivity in a compact chassis. Builders requiring a larger form factor or discrete CPU socket should look elsewhere.

Sustained load behaviour

The Intel X550-AT2 controller provides two 10 GbE RJ45 ports for continuous high-throughput networking. Four DDR4 slots support ECC UDIMM, RDIMM and LRDIMM up to 2666 MT/s in dual-channel mode. The SoC design integrates the north bridge, reducing component count and thermal complexity during prolonged operation. A dedicated IPMI LAN port enables out-of-band management without interrupting primary traffic.

Upgrade path from single-GbE or non-ECC platforms

This board replaces older Mini-ITX servers limited to single gigabit LAN and non-ECC memory. The jump is worthwhile when workloads demand 10 GbE bandwidth, hardware error correction, or the eight-core EPYC 3251 compute density. It also adds an M.2 slot supporting 22110 form factors and an OCulink interface for four additional SATA devices. Systems already running dual 10 GbE with ECC on a compatible platform gain less immediate benefit.

Highlights

  • 8-core AMD EPYC 3251 SoC delivers 16-thread performance for dense workloads
  • Dual 10 GbE Intel X550-AT2 ports provide high-throughput networking
  • Four DDR4 slots support ECC UDIMM, RDIMM and LRDIMM up to 128 GB
  • M.2 slot accepts PCIe 3.0 x4 or SATA drives up to 22110 form factor
  • Mini-ITX 6.7" square fits compact 1U and embedded chassis

Specifications

BrandAsRock Rack
ModelEPYC3251D4I-2T
CPU TypeSupport AMD EPYC 3251 (8 cores, 16 threads)
Number of Processor Support1
North BridgeSoc
Number of DDR4 Slots4 x 288-pin
DDR4 StandardECC / UDIMM: 2133 / 2400 / 2666 MHz
RDIMM: 2133 / 2400 / 2666 MHz
Maximum Memory SupportedMax. Capacity per DIMM
ECC UDIMM, RDIMM, LRDIMM: up to 128GB
Channel SupportedDual Channel
ECC SupportedYes
RegisteredYes
PCI Express 3.0 x16SLOT7: PCIe3.0 x16
SATAAMD Built-in Storage: 6 x SATA III 6.0 Gb/s (4 x SATA from OCulink, 2 x SATA III 6.0 Gb/s)
M.21 x M-Key (PCIe3.0 x4 or SATAIII 6.0 Gb/s); Supports 22110/2280 form factor
Onboard Video ChipsetAspeed AST2500
LAN ChipsetIntel X550-AT2
LAN Speed10Gbps
Max LAN Speed2 x 10Gbps
Back I/O PortsUID Button/LED: 1
VGA Port: D-sub x 1
USB 3.2 Gen1 Port: 2
RJ45:
- 2 x 10GLAN RJ45(by Intel X550-AT2 )
- 1 x RJ45 Dedicated IPMI LAN port
- LAN Ports with LED (ACT/LINK LED and SPEED LED)
Onboard USBUSB 3.2 (Gen1) Header: 1 (supports 2 USB 3.1 Gen1 ports)
Other ConnectorsPower Connector: 1 x (4-pin) + 1 x (8-pin) support 12V DC-IN
Other Power Connectors: 1 (4-pin) for HDD power
Auxiliary Panel Header: 1 (include chassis intrusion, 2 front LAN LED, System LED)
System Panel: 1
COM Header: 1
Fan Header: 1 x CPU Fan, 2 x System Fans (1 front, 1 rear) (build in CPU active fansink)
TPM Header: 1 x (13-pin)
SGPIO Header: 1
SMBus header: 1
PMBus header: 1
IPMB Header: 1
Clear CMOS: 1 (short pad)
Form FactorMini ITX
Dimensions (W x L)6.7" x 6.7"
Shipping weight0.98 kg
Package size277 × 241 × 56 mm

Questions about this item

How hot or noisy does the AMD EPYC 3251 SoC on this Mini-ITX board run under sustained load?

The integrated AMD EPYC 3251 SoC has no separate socket; thermal output and fan noise depend on the cooler you choose and the chassis airflow.

What memory modules do I need to have on hand before this motherboard will POST?

You need DDR4 ECC UDIMM, RDIMM or LRDIMM modules at 2133, 2400 or 2666 MT/s; the board has four 288-pin slots and supports up to 128 GB total.

Will my existing SATA drives and PCIe 3.0 add-in cards work with the onboard storage and expansion slots?

Yes — six SATA III 6.0 Gb/s ports are provided, plus one PCIe 3.0 x16 slot and an M.2 M-key slot that accepts 22110 or 2280 drives.

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