ASRock AMD A55 FCH ATX DDR3 1333 AMD-FM1 Motherboards A55 PRO3 CPU: Socket FM1 Support AMD A8/A6/A4/E2/ Athlon/ Sempron Processors Chipset: AMD A55 FCH (Hudson-D2) Slots: 2x PCI-Express 2.0 x16 Slots(one run at x4; Supports AMD Quad CrossFireX/ CrossFireX); 1x PCI-Express 2.0 x1 Slot; 3x PCI Slots SATA: 2x SATA3 Ports, 5x SATA2 Ports, Support RAID 0/ 1/ 10; 1x eSATA2 Port Ports: 10x USB 2.0 Ports (4 rear, 6 by headers); 2x USB 3.0 Ports; 2x PS/2 Port; 1x VGA Port; 1x HDMI Port; 1x Optical SPDIF Out; 1x eSATA2 Port; 1x RJ45 LAN Port; Audio I/O Jacks Power Connector: 1x 24pin main power, 1x 8pin CPU power Form Factor: ATX Memory: 4x DDR3-2400+(OC)/1866(OC)/1600(OC)/1333/1066/800 DIMMs