Asus X99-M WS Workstation Motherboard - Intel X99 Chipset - Socket LGA 2011-v3 - Micro ATX - 1 x Processor Support - 64 GB DDR4 SDRAM Maximum RAM - 3.20 GHz (O.C.) Memory Speed Supported - DIMM - 4 x Memory Slots - SLI, CrossFireX Support - Serial ATA/600 RAID Supported Controller - 0, 1, 5, 10 RAID Levels - 4 x USB 3.0 Port - Bluetooth - Wireless LAN - 7.1 Audio Channels - Gigabit Ethernet - 1 x PCI Express x1 Slots - 3 x PCI Express x16 Slots - 8 x USB Ports - S/PDIF - 1 x M.2 Interfaces