ASRock B550M Pro RS

This is an Micro-ATX board on the B550M chipset, AM4 socket. Expansion includes 2 M.2 slots and 2 PCIe slots. Memory support covers 4 DDR4 slots up to 128GB total. Start with socket compatibility for your CPU, then weigh chipset extras.

At $84.99 it sits in the budget motherboard bracket. Use the PlanMyPC system builder to verify it works alongside your other components and to watch live retailer pricing. Support and warranty service run through ASRock, with terms that vary by region. The full specification sheet below breaks out every listed detail, and the compatibility checker flags conflicts with parts already in your build.