Mfr Part Number: M5A99X EVO CPU: Socket AM3+ Support FX/ Phenom II /Athlon II /Sempron 100 Series Processors; Supports CPU upto 8 cores; Support 140W CPU; Support AMD Cool ´n´ Quiet Technology Chipset: AMD 990X & SB950 Memory: 4x DDR3-2133(O.C.)/1866/1600/1333/1066 DIMMs, Dual Channel, ECC/Non-ECC, Un-buffered, Max Capacity upto 32GB Slots: 3x PCI-Express 2.0 x16 Slots(two run at x8, one run at x4, Support AMD Quad CrossFireX & nVidia Quad SLI); 2x PCI-Express 2.0 x1 Slots; 1x PCI Slot SATA: 2x SATA2 Ports; 6x SATA3 Ports, Support RAID 0/ 1/ 5/ 10; 2x eSATA2 Ports(1x Power eSATA2) Audio: Realtek ALC892 8-Channel High Definition Audio CODEC LAN: Integrated Realtek 8111E Gigabit Ethernet Controller Ports: 14x USB 2.0 Ports (8 rear, 6 at mid-board); 4x USB 3.0 Ports (2 rear, 2 at mid-board); 1x PS/2 Port; 2x eSATA2 Ports(1x Power eSATA2); 2x IEEE 1394a Ports (1 rear, 1 at mid-board); 1x Optical S/PDIF out; 1x RJ45 LAN Port; Audio I/O Jacks Power Connector: 1x 24pin Main Power, 1x 8pin CPU Power Form Factor: ATX, 9.6 x 12.0 inch / 24.4 x 30.5 cm Package: Retail RoHS Compliant