Asus P9X79 MB, Socket 2011, X79, 8x DDR3, 3x PCI-E 3.0, GbLAN, 8CH, RAID, USB3, SATA3, Quad-GPU SLI/CrossFireX, FireWire, ATX, Intel® Socket 2011 for 2nd Generation Core™ i7 Processors , Supports Intel® Turbo Boost Technology 2 , Intel® X79, 8 x DIMM, Max. 64GB, DDR3 2400(O.C.)/2133(O.C.)/1866/1600/1333/1066 MHz Non-ECC, Un-buffered Memory, Quad Channel Memory Architecture, Supports Intel® Extreme Memory Profile (XMP), Supports NVIDIA® Quad-GPU SLI™ Technology , Supports AMD Quad-GPU CrossFireX™