AS Rock LGA1155 Intel Z77 CrossFireX SATA3 USB3.0 A GbE ATX Motherboard  Z77 PRO4 CPU: LGA1155; Supports Intel 2nd/3rd Generation Core i7/ i5/ i3 Processors; Supports Intel Turbo Boost 2.0 Technology; Supports Hyper-Threading Technology Chipset: Intel Z77 Memory: 4X DDR3 2800+(OC)/2400(OC)/2133(OC)/1866(OC)/1600/1333/1066 DIMM Slots Non-ECC, Unbuffered, Dual Channel, Maxi Capacity up to 32GB Slots: 1X PCI-Express 3.0 X16 Slot; 1X PCI-Express 2.0 X16 Slot (run at X4); 1X PCI-Express 2.0 X1 Slot; 3 X PCI slots SATA: 4X SATA3 Ports two support RAID?0, 1, 5, 10; 4X SATA2 Ports support RAID?0, 1, 5, 10 Ports: 10X USB 2.0 Ports (6 rear,?4?via header); 4X USB 3.0 Ports (2 rear,?2 via header); 1X PS/2 Keyboard Port; 1X RJ45 LAN Port; 1X HDMI Port; 1X VGA Port; 1X?DVI Port; 1 X Optical SPDIF Out Port; Audio I/O Jacks Power Connector: 1X 24-Pin ATX Power Connector, 1X 8-Pin 12V Power Connector