Gigabyte Ultra Durable 3 Classic GA-990FXA-UD3 Desktop Motherboard - AMD 990FX Chipset - Socket AM3 PGA-941 - ATX - 1 x Processor Support - 32 GB DDR3 SDRAM Maximum RAM - DDR3-2000/PC3-16000, DDR3-1866/PC3-15000, DDR3-1600/PC3-12800, DDR3-1333/PC3-10600, DDR3-1066/PC3-8500 - 4 x Memory Slots - SLI, CrossFireX Support - Serial ATA/600 RAID Supported Controller - 2 x USB 3.0 Port - 7.1 Audio Channels - Gigabit Ethernet - 2 x PCI Express x1 Slots - 2 x PCI Express x4 Slots - 2 x PCI Express x1