P7P55D LE Motherboard Intel Socket 1156 for Core i7 4 x DIMM, Max. 16 GB, DDR3 2000(O.C.)*/1600/1333/1066 Supports ATI Quad-GPU CrossFireX Technology 2 x PCI Express 2.0 x16, 2 x PCI Express 2.0 x1, 3 x PCI