Socket Processor Intel Socket 2011 for 2nd Generation Intel Core i 7 Processor Extreme Edition Chipset Intel X79 Express Chipset Memory 8 x DIMM Max. 64GB DDR3 240021331866160013331066 MHz Expansion 3 x PCIe 3.0 x 16 slots dual x 16x 16 triple x 16x 16x 8 2 x PCIe 2.0 x 1 slots 1 x PCI slot Multi GPU NVIDIA Quad-GPU SLI & AMD Quad-GPU Cross Fire X Technology Audio Realtek ALC 892 8-channel High Definition LAN Intel 82579V Gigabit LANForm Factor ATX 12x 9.6 30.5cm x 24.4cm Connectivity SATA 6 Gbs & USB (Universal Serial Bus) 3.0 At the very top end of motherboard performance the P9X79 series from ASUS based on the Intel X79 Chipset & 2011 socket brings you complete power enhanced with unmatched flexibility & boundless tuning possibilities. These new boards launch with the worlds first digital power controls for both the CPU & memory thanks to exclusive ASUS New DIGI Power Control Technology. They further put power right in your hand via UEFI BIOS the most detailed & accessible BIOS ever allowing you to tune your system to its full performance potential. You also get USB (Universal Serial Bus) BIOS Flashback for the easiest ever BIOS modification all it takes is a USB (Universal Serial Bus) stick & one button press Sign up for total power & performance insight with the new ASUS P9X79 Series. br The worlds first Dual Intelligent Processors from ASUS pioneered twin on board chips TPU Turbo V Processing Unit & EPU Energy Processing Unit. Third generation Dual Intelligent Processors with New DIGI Power Control include two digital voltage regulator modules VRMs. An all-new digital controller now allows ultra-precise DRAM tuning. EPU provides system energy saving & real time power management. TPU delivers a second micro-processor to free CPU resources as well as easy O.C. & an instant performance boost through an on-board switch or the easy O.C. tool Turbo V EVO.br