ASUS Digi+ II 8+2 Phase Power 8 x DIMM Intel X79 ATX DDR3 2400 Intel LGA 2011 Motherboards, Rampage IV Extreme/BF3 8 x DIMM Slots, Quad-channel DDR3 2400(O.C.)/2133(O.C.)/1866/1600/1333/1066 MHz Support Extreme Engine Digi+ II 8+2 Phase Power Design 4 x PCIe 3.0 x16 (dual@x16; triple@x16/x8/x16; quad@x16/x8/x8/x8) AMD 4-Way CrossFireX and NVIDIA 4-Way SLI support Bluetooth v2.1 + EDR OC Key - New revolutionary way to overclock and instant performance tweak convenience for enthusiasts Subzero Sense - Integrated thermometer measuring from -200C to +1350C - Ideal for LN2 Over clockers ROG UEFI BIOS - Exclusive features and theme only on ROG UEFI BIOS