Asus WS C621E SAGE Workstation Motherboard - Intel Chipset - Socket P LGA-3647 - SSI EEB - 2 x Processor Support - 768 GB DDR4 SDRAM Maximum RAM - 2.67 GHz, 2.40 GHz Memory Speed Supported - DIMM, RDIMM, LRDIMM - 12 x Memory Slots - Serial ATA/600 RAID Supported Controller - 0, 5, 10 RAID Levels - 7.1 Audio Channels - Gigabit Ethernet - 7 x PCI Express x16 Slots - 10 x USB Ports - S/PDIF - 1 x M.2 Interfaces - 10 x SATA Interfaces: