ASUS WS X299 PRO/SE ATX Workstation Motherboard - Socket LGA 2066 - Intel X299 Chipset - Supports DDR4-4133(OC) - 4x PCIe 3.0 x16 - 3-Way SLI/CrossFire Ready - 2x M.2 Socket3 - 1x U.2 Connector - USB 3.1 Gen2 Type-A/C - Dual Intel LAN (WS X299 PRO/SE)