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Green Micro-ATX server motherboard with silver AM5 socket, four black DDR5 slots, one long PCIe x16 slot, two M.2 sockets

ASRock Rack

ASRock Rack EPYC4000D4U Micro-ATX server motherboard AM5 4×DDR5 1×PCIe5.0 x16 2×M.2 2×1GbE

SKU CH-DWD7-WTA90 MPN EPYC4000D4U

Micro-ATX server board for AMD EPYC 4004/4005 and Ryzen 7000/8000/9000 CPUs with four DDR5 ECC slots, one PCIe 5.0 x16 slot and dual 1 GbE LAN

  • ProcessorAMD EPYC 4004 Series / AMD EPYC 4005 Series / AMD Ryzen 7000
  • Form factorMicro ATX
  • CPU socketSocket AM5
  • Supported CPU count1
  • Processor detailsThermal Design Power Up to 170 W by proper cooling solution
  • RAM slots4 x DDR5 288-pin
  • Supports AMD EPYC 4004/4005 and Ryzen 7000/8000/9000 CPUs via Socket AM5
  • Four DDR5 5600 slots with ECC support up to 48 GB
  • PCIe 5.0 x16 slot plus dual M.2 PCIe 5.0 x4 for fast expansion
  • Dual 1 GbE LAN ports with Intel I210 controllers
  • Micro-ATX 9.6" × 9.6" form factor with ATX or 12 V DC-in power options

Micro-ATX EPYC 4000 platform

The EPYC4000D4U is a Micro-ATX server motherboard for Socket AM5 processors. It accepts one AMD EPYC 4004 series, EPYC 4005 series, or Ryzen 7000/8000/9000 series CPU with a thermal design power up to 170W. The board targets compact single-socket servers or workstations that need ECC memory and PCIe 5.0 expansion in a 9.6-inch square form factor.

Build quality and daily connectors

Four DDR5 288-pin slots support up to 48GB of DDR5 5600 ECC or non-ECC UDIMM. Expansion includes one PCIe 5.0 x16 slot, two MCIO connectors providing PCIe 5.0 x8 and dual x4 links, plus two M.2 M-key slots for 2280 or 2242 drives. Rear I/O supplies dual 1GbE via Intel I210, COM, D-Sub, DisplayPort, HDMI, and two USB 3.2 Gen 1 Type-A ports. Power input uses a 24-pin ATX plus dual 8-pin 12V connectors with 12V DC-in support.

Compatibility checks before ordering

Verify that your chosen CPU is from the supported EPYC 4004, EPYC 4005, or Ryzen 7000/8000/9000 series, as PCIe lane allocation changes with Ryzen 8000 Phoenix and Phoenix2 models. Confirm the chassis fits the 9.6 by 9.6 inch Micro-ATX footprint and can deliver adequate cooling for up to 170W TDP. Ensure the power supply provides both 8-pin 12V connectors or plan for the 12V DC-in alternative. Memory must be DDR5 UDIMM; other DDR generations will not fit.

How it compares

Measured against everything we stock in Server & Workstation Boards, at today’s prices. Recalculated every night.

Price $256.99
Typical for this category: the median of 776 items is $254.49.

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Specifications

Product
Brand nameAsRock Rack
Model nameEPYC4000D4U
Processor
ProcessorAMD EPYC 4004 Series / AMD EPYC 4005 Series / AMD Ryzen 7000 Series / AMD Ryzen 8000 Series / AMD Ryzen 9000 Series
CPU socketSocket AM5
Supported CPU count1
Processor detailsThermal Design Power Up to 170 W by proper cooling solution
Memory
RAM slots4 x DDR5 288-pin
Supported memoryDDR5 5600
Max supported RAM48 GB
ECC supportYes
Storage
M.2 slots2 M-key (PCIe5.0 x4), supports 2280/2242 form factor [CPU]*
*When installing AMD Ryzen 8000 Series (Phoenix) Processors, 2 M.2 will support only PCIe4.0 x4
*When installing AMD Ryzen 8000 Series (Phoenix2) Processors, M2_1 will support only PCIe4.0 x2 and M2_2 will support only PCIe4.0 x4
Connectivity
Ethernet controllerIntel I210
Maximum network speed2 × 1 Gbit/s
Ports & slots
Rear panel ports1 x COM (Serial Port) / 1 x D-Sub / 1 x DisplayPort / 1 x HDMI / 2 x LAN (RJ45) / 2 x USB 3.2 Gen 1 Type-A
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in
Shipping weight1.13 kg
Package size305 × 287 × 71 mm
More details
BIOSAMI UEFI BIOS; 256Mb (32 MB) SPI Flash ROM
Plug and Play, ACPI 6.4 compliance wake up events, SMBIOS 3.5

Questions about this item

What bandwidth does the PCIe 5.0 x16 slot deliver with an AMD Ryzen 8000 series processor?

With AMD Ryzen 8000 series (Phoenix) processors the slot runs at PCIe 4.0 x8, and with Phoenix2 processors it runs at PCIe 4.0 x4.

What power connectors must the chassis supply for this Micro-ATX board?

The board needs a 24-pin ATX main connector, two 8-pin ATX 12V connectors, and a 4-pin HDD power connector.

How is the DDR5 memory installed and which capacity limit applies?

Populate the four 288-pin DDR5 slots with ECC or non-ECC UDIMMs; the board supports up to 48 GB total at DDR5 5600.

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