Model Name X399 SLI PLUS CPU Support Supports AMD CPU Socket SocketTR4 Chipset AMD X399 Chipset Graphics Interface 4 x PCI-E 3.0 x16 Slots Supports 4-way SLI / 4-way CrossFire Memory Support 8 DIMMs, Quad Channel DDR4 3600+ (OC) Expansion Slots 2 x PCI-E 2.0 x1 slots SATA / M.2 / U.2 3 x M.2 slots + 8 x SATA 6Gb/s USB 3.1 Gen2 3 x USB 3.1 Gen2 (Type A+C) USB 3.1 Gen1 12 x USB 3.1 Gen1 USB 2.0 6 x USB 2.0 LAN Intel I211 Gigabit LAN Audio 8-Channel (7.1) HD Audio with Audio Boost 4 Form Factor ATX