ASUS Rampage IV Extreme LGA 2011 Intel X79 SATA 6Gb/s USB 3.0 Extended ATX Intel Motherboard Intel Socket 2011 for 2nd Generation Core i7 Processors Intel X79 Chipset 4 x PCIe 3.0/2.0 x16 1 x PCIe 3.0/2.0 x16 (x8 mode, gray) 1 x PCIe 2.0 x1 Supports NVIDIA 4-Way SLI Technology; Supports AMD 4-Way CrossFireX Technology Bluetooth v2.1 + EDR 8 x DIMM, Max. 64GB, DDR3 2400(O.C.)/2133(O.C.)/1866/1600/1333/1066 MHz Non-ECC, Un-buffered Memory