Socket 2011-3, Intel X99 Chipset, 8x DDR4 3200MHz (OC), 7 x PCI-E 3.0 Slots, 8x SATA3, 1x SATA Express, 1x M.2 x4 Socket 3, 2x USB 3.1, 12x USB 3.0 (8 rear, 4 internal), 2x Gigabit LAN, 2x eSATA, Realtek ALC1150 8-Channel High Definition Audio CODEC featuring Crystal Sound 2, CEB form factor. Backed by a 3 year ASUS warranty.