MSI Computer Corp. DDR3 1600 Intel LGA 1155 Motherboards (Z77A-GD55) Chipset: Intel Z77 Memory: 4x DDR3-2800(OC)/2667/2600/2400/2200/2133/2000/1866/1600/1333/1066 DIMM Slots, Dual Channel, Max Capacity up to 32 GB Slots: 2x PCI-Express 3.0 x16 Slots, 1x PCI-Express 2.0 x16 Slot, 4x PCI-Express 2.0 x1 Slots Multi-Graphics: Supports ATI CrossFire & NVIDIA SLI Technology SATA: 2x SATA3 Ports, 4x SATA2 Ports; Supports AHCI/RAID 0, 1, 5, 10 Ports: 10x USB 2.0 Ports (4 rear, 6 via headers); 4x USB 3.0 Ports (2 rear, via header); 1x PS/2 Keyboard/Mouse Port; 1x VGA Port; 1x?DVI Port; 1x?Coaxial S/PDIF-Out ?Port; 1x?Optical S/PDIF-Out Port; 1x HDMI Port; 1x RJ45 LAN Port; Audio I/O Jacks Power Connector: 1x 24pin ATX Power Connector, 1x 8pin ATX 12V Power Connector Form Factor: ATX