Asus WS X299 SAGE Workstation Motherboard - Intel Chipset - Socket R4 LGA-2066 - SSI CEB - 1 x Processor Support - 128 GB DDR4 SDRAM Maximum RAM - 4 GHz O.C., 4.13 GHz O.C., 3.60 GHz O.C., 4.20 GHz O.C., 2.67 GHz, 2.40 GHz, 2.13 GHz Memory Speed Supported - UDIMM, DIMM - 8 x Memory Slots - Intel Optane Memory Ready - Serial ATA/600 RAID Supported Controller - Intel VROC - Intel RSTe - 10, 5, 1, 0 RAID Levels - 7.1 Audio Channels - Gigabit Ethernet - 7 x PCI Express x16 Slots - 12 x USB Port: