Gigabyte Ultra Durable GA-990FX-Gaming Desktop Motherboard - AMD 990FX Chipset - Socket AM3+ - ATX - 1 x Processor Support - 32 GB DDR3 SDRAM Maximum RAM - 2 GHz, 1.87 GHz, 1.60 GHz, 1.33 GHz, 1.07 GHz (O.C.) Memory Speed Supported - DIMM - 4 x Memory Slots - CrossFire Support - Serial ATA/600 RAID Supported Controller - 0, 1, 5, 10, JBOD RAID Levels - 2 x USB 3.0 Port - 7.1 Audio Channels - Gigabit Ethernet - 3 x PCI Express x1 Slots - 1 x PCI Express x4 Slots - 2 x PCI Express x16 Slots -