MSI Z68A-GD55 (B3) LGA1155 Intel Z68 B3 DDR3 CrossFireX & SLI SATA3 and USB 3.0 A&V&GbE ATX Motherboard CPU: Socket 1155 Support Intel Sandy Bridge Processors Chipset: Intel Z68 (B3) Chipset Memory: 4x DDR3-2133(O.C.)/1600/1333/1066 DIMMs, Dual Channel, Unbuffered, Max Capacity up to 32GB Slots: 2x PCI-Express 2.0 x16 Slots(support CrossFireX & SLI); 3x PCI-Express x1 Slots; 2x 32-bit 3.3v/5v PCI Slots SATA: 4x SATA2 Ports, 2x SATA3 Ports, support RAID 0/ 1/ 5/ 10 CPU: Socket 1155 Support Intel Sandy Bridge Processors Chipset: Intel Z68 (B3) Chipset Memory: 4x DDR3-2133(O.C.)/1600/1333/1066 DIMMs, Dual Channel, Unbuffered, Max Capacity up to 32GB Slots: 2x PCI-Express 2.0 x16 Slots(support CrossFireX & SLI); 3x PCI-Express x1 Slots; 2x 32-bit 3.3v/5v PCI Slots SATA: 4x SATA2 Ports, 2x SATA3 Ports, support RAID 0/ 1/ 5/ 10 Audio: Realtek ALC892 Flexible 8-channel Audio Codec w/ jack sensing LAN: Realtek 8111E PCI-Express Gigabit Ethernet Controller Ports: 10x USB 2.0 Ports (4 rear, 6 by header); 4x USB 3.0 Ports(2 rear, 2 by header); 1x PS/2 Port; 1x VGA Port; 1x DVI Port; 1x HDMI Port; 1x Optical SPDIF Out; 1 x Coaxial SPDIF Out; 1x RJ45 LAN Port; Audio I/O jacks