ASRock X299 Extreme4

An ATX board on the X299 chipset, LGA2066 socket. Expansion covers 2 M.2 slots and 2 PCIe slots. Memory support covers 8 DDR4 slots up to 128GB total. Pick the board for its socket before anything else — chipset niceties come after.

Its $159.99 price tag places it squarely in mid-range territory. PlanMyPC's builder flags compatibility problems automatically and tracks the latest motherboard deals from multiple stores. 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.