Which is better for a new server build?

The EPYC4000D4U. It takes current EPYC 4005/4004 and Ryzen 9000/8000/7000 chips, DDR5 ECC UDIMMs and PCIe 5.0 devices. The X570D4U locks you to AM4 and DDR4.

Is the X570D4U worth it if I already have a Ryzen 5000 CPU?

Yes. Reusing an AM4 CPU and DDR4 saves more than the $11 price difference. Just accept that you cannot upgrade the CPU or memory generation later.

Which has faster storage?

The EPYC4000D4U. It has two M-key PCIe 5.0 x4 M.2 slots. The X570D4U runs PCIe 4.0, so its drives top out at roughly half the sequential bandwidth.

How much memory can each take?

The EPYC4000D4U supports 4 DDR5 ECC/non-ECC UDIMMs at up to 48 GB each, at 5600 MHz with one DIMM per channel. The X570D4U lists 4 DDR4 slots, 3200 MHz and 32 GB maximum capacity.

Which is cheaper right now?

The X570D4U at $319.00 at DirectDial as of November 3, 2026, versus $330.40 at CORGITECH for the EPYC4000D4U. That is about an $11 gap before you count CPU and memory costs.

Do either have integrated graphics?

The X570D4U lists integrated graphics with VGA and DVI ports. The EPYC4000D4U specs list no video outputs, so plan on a discrete GPU or headless management.

ASRock Rack EPYC4000D4U Micro-ATX Single Socket Server Motherboard vs ASRock Rack X570D4U Micro ATX Server Motherboard

Buy the EPYC4000D4U if you are building a new AM5 server or workstation and want PCIe 5.0, DDR5 and current EPYC 4005/4004 or Ryzen 9000/8000/7000 support. Buy the X570D4U only if you already own an AM4 Ryzen 5000 CPU and DDR4 memory, since it is a dead-end platform. The price gap is small: $330.40 at CORGITECH versus $319.00 at DirectDial as of November 3, 2026, so the newer board costs about $11 more.

Today the ASRock Rack X570D4U Micro ATX Server Motherboard costs $11.40 less at its best price.

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