ASRock X99 Extreme6/ac

This is an ATX board on the LGA2011-3 socket. Memory support covers 8 DDR4 slots up to 128GB total. Expansion covers 2 M.2 slots and 2 PCIe slots. Pick the board for its socket before anything else — chipset niceties come after.

PlanMyPC's builder flags compatibility problems automatically and tracks the latest motherboard deals from multiple stores. Warranty coverage follows ASRock's standard policy — confirm regional terms on the listing. The full specification sheet below breaks out every listed detail, and the compatibility checker flags conflicts with parts already in your build. If this motherboard is not quite the right fit, the category page lists close alternatives at similar prices for a quick side-by-side comparison.