ROG Maximus IX Formula Desktop Motherboard - Intel Z270 Chipset - Socket H4 LGA-1151 - ATX - 1 x Processor Support - 64 GB DDR4 SDRAM Maximum RAM - 3 GHz O.C., 2.80 GHz O.C., 3.60 GHz O.C., 3.87 GHz O.C., 2.40 GHz O.C., 3.73 GHz O.C., 3.20 GHz O.C., 4 GHz O.C., 3.30 GHz O.C., 3.33 GHz O.C., 3.47 GHz O.C., ... ... Memory Speed Supported - UDIMM, DIMM - 4 x Memory Slots - CrossFireX, SLI Support - Serial ATA/600 RAID Supported Controller - 10, 5, 1, 0 RAID Levels - CPU Dependent Video - 4 x U: