Gigabyte B550M AORUS PRO AX

This is an Micro-ATX board on the B550M chipset, AM4 socket. Memory support covers 4 DDR4 slots up to 128GB total. Expansion includes 2 M.2 slots and 2 PCIe slots. Pick the board for its socket before anything else — chipset niceties come after.

Expect to pay around $119.99, which lands it among budget options. PlanMyPC's builder flags compatibility problems automatically and tracks the latest motherboard deals from multiple stores. Support and warranty service run through Gigabyte, with terms that vary by region. Scroll down for the complete spec table; the builder's compatibility checker will warn you about any conflicts with components you have already picked.