Asus X99-A II

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.

At $369.99 it sits in the high-end 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 ASUS, 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.