ASRock Rack B650D4U Micro-ATX server motherboard

Micro-ATX server board for AMD EPYC 4004

This Micro-ATX motherboard fits a single LGA 1718 socket and accepts AMD EPYC 4004 or Ryzen 9000, 8000 and 7000 series processors with a thermal design power up to 170 W. Four DDR5 288-pin DIMM slots support ECC or non-ECC UDIMM modules up to 48 GB each. The board targets builders who need server-grade features in a compact 9.6-inch square form factor.

Thermals noise and power draw in normal use

Processor power delivery is rated for up to 170 W when paired with a proper cooling solution, so thermal performance will depend on the chosen cooler and chassis airflow. The onboard Aspeed AST2600 video controller and dual Intel i210 1 GbE controllers operate at low power, while the single Realtek RTL8211F management LAN adds minimal load. No active cooling components are integrated on the board itself, leaving acoustic profile entirely to the system integrator.

DDR5 ECC UDIMM support up to 48 GB per slot

Memory runs at 5200 MHz with one DIMM per channel and at 3600 MHz when both channels are populated, and ECC is supported across all four slots. This capacity ceiling determines whether the platform can hold the dataset or virtual-machine count a given workload requires. Builders who need larger per-module densities or registered DIMM support must select a different platform.