ASRock DDR3 2400 LGA 2011 Motherboard X79 EXTREME4-M LGA 2011 Intel X79 Supports Quad Channel DDR3 2400+(OC) 3 x PCIe 3.0 x16 Slots, Supports AMD Quad CrossFireX and NVIDIA Quad SLI 7.1 CH HD Audio with Content Protection (Realtek ALC898 Audio Codec), Supports THX TruStudio