The GIGABYTE GA-990FXA-UD3 is an AMD 990FX + SB950 chipset ATX motherboard designed for Socket AM3+ processors, including AMD FX/Phenom II/Athlon II/Sempron series. It features a 8+2 phase VRM design with Ultra Durable? 3 technology for enhanced power efficiency and stability. The motherboard supports Dual Channel DDR3 memory with frequencies up to 1866MHz (OC) across 4 DIMM slots, with a maximum capacity of 32GB. Expansion capabilities include 4 PCI Express 2.0 x16 slots (x16/x16/x8/x8 configuration) supporting 4-Way/3-Way/2-Way AMD CrossFireX? technology, plus 1 PCI Express 2.0 x1 slot and 1 PCI slot. Storage options feature 6 SATA 6Gb/s ports with RAID 0/1/5/10 support, along with 2 eSATA 6Gb/s ports on the rear I/O. Networking is handled by a Realtek Gigabit LAN controller (10/100/1000 Mbit). The board includes high-quality audio capacitors for 7.1+2 channel HD audio with S/PDIF optical output. Rear panel conNECtivity features 8 USB 2.0/1.1 ports, 2 USB 3.0 ports, PS/2 keyboard/mouse port, and legacy serial/parallel ports. Additional highlights include GIGABYTE's DualBIOS? technology, On/Off Charge for mobile devices, and support for AMD OverDrive? utility for performance tuning. The motherboard's durable construction includes all-solid capacitors and an enhanced heatsink design for improved thermal performance.