Device · ASRock

ASRock B550M Pro4

verified 2026-10-13 Specs from ASRock specification page. Also known as: b550m pro4.

Specs

socketAM4
chipsetAMD B550
memory typeDDR4
form factorMicro-ATX

Takes

  • CPU socket AMD Socket AM4 (CPU socket)
    AMD desktop socket for Ryzen 1000-5000 series processors; AM4 boards use DDR4 memory.
  • cooler mount AMD AM4 cooler mounting (stock AMD backplate)
    CPU coolers that mount on an AM4 board using AMD's standard backplate / retention hardware.

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Good to know
  • AMD: not all processors are supported on every chipset, and support may require a BIOS upgrade. Check the board maker's CPU support list for the minimum BIOS before buying.
  • Ryzen 5000 runs on X570, B550, A520 and on 400-series boards (X470, B450) per AMD's chipset table, but a 400-series board whose BIOS predates Ryzen 5000 must be updated before it will boot one.
  • On 300-series boards (X370, B350, A320) AMD marks Ryzen 5000 as 'Selective Beta BIOS update needed' - only some boards got that BIOS.
  • AM4 processors do not fit AM5 boards and AM5 processors do not fit AM4 boards.
  • Low-profile coolers that replace the stock AMD backplate (e.g. Noctua NH-L9a-AM4, NM-AM4-L9aL9i kit) fit AM4 but not AM5.
  • Noctua notes some AMD boards violate AMD's 96x114 mm keep-out zone; check RAM and VRM-heatsink clearance with large coolers.

What fits the ASRock B550M Pro4?

31 parts and accessories in the graph work with this model. OEM parts first.

CPU socket

cooler mount

Informational only. Confirm with the manufacturer before buying or installing. Spotted a mistake? Report it.