INTEL P55, LGA 1156 4*DDR3-2133(OC)/1600/1333/1066 Dual Ch, 2*PCIe2.0x16(1x16 or dual x8)(SLI+CrossFireX)/1 x PCIe x4 @ x4 Speed/1*PCI, SATA 3Gb/s*6(RAID 0,