ASUS P7P55D LE

Intel® Socket 1156 Core™ i7 Processor/Core™ i5 Processor Supports Intel® Turbo Boost Technology Chipset Intel® P55 Express Chipset Memory 4 x DIMM, Max. 16 GB, DDR3 2200(O.C.)*/1600/1333/1066 Non-ECC,Un-buffered Memory Dual Channel memory architecture Supports Intel® Extreme Memory Profile (XMP) *Hyper DIMM support is subject to the physical characteristics of individual CPUs. Some hyper DIMMs only support one DIMM per channel. Please refer to Memory QVL for details. *Refer to www.asus.com or this user manual for the Memory QVL (Qualified Vendors Lists). Expansion Slots 1 x PCIe 2.0 x16 (single at x16) 1 x PCI Express 2.0 x16 slot (at x4 mode, 2.5GT/s) 2 x PCI Express 2.0 x1 slots (2.5GT/s) 3 x PCI Multi-GPU Support Supports ATI® Quad-GPU CrossFireX™ Technology Storage Intel® P55 Express Chipset built-in 6 xSATA 3.0 Gb/s ports Intel Matrix Storage Technology Support RAID 0,1,5,10 JMicron® JMB361 PATA and SATA controller 1 xUltraDMA 133/100/66 for up to 2 PATA devices 1 xExternal SATA 3Gb/s port at rear LAN Realtek® 8112L Gigabit LAN controller featuring AI NET2 Audio VIA® VT1828S 8-Channel High Definition Audio CODEC - Absolute Pitch BD192/24 - DTS Surround Sensation UltraPC - BD audio layer Content Protection - Supports Jack-Detection, Multi-streaming, Front Panel Jack-Retasking - Optical S/PDIF out port at back I/O USB 14 USB 2.0/1.1 ports (6 ports at mid-board, 8 ports at back panel) ASUS Unique Features ASUS Exclusive Overclocking Features - ASUS TurboV - ASUS Turbo Key ASUS 8+2 Phase Power Design ASUS Xtreme Design ASUS Exclusive Features - MemOK! - ASUS EPU - Express Gate ASUS Quiet Thermal Solution - ASUS Fanless Design: Stylish Heatsink Solution - ASUS Fanless Design: Stack Cool 3 - ASUS Fan Xpert ASUS Crystal Sound - ASUS Noise Filter ASUS EZ DIY - ASUS Q-DIMM - ASUS Q-Shield - ASUS Q-Connector - ASUS O.C. Profile - ASUS CrashFree BIOS 3 - ASUS EZ Flash 2 - ASUS MyLogo 2 - Multi-language BIOS Overclocking Features Precision Tweaker - vCore: Adjustable CPU voltage at 0.00625V increment - vIMC: Adjustable IMC voltage at 0.05V increment - vDRAM Bus: 8-step DRAM voltage control - vPCH: 2-step chipset voltage control - vCPU PLL: 4-step reference voltage control SFS (Stepless Frequency Selection) - PCI Express frequency tuning from 100MHz up to 200MHz at 1MHz increment - Internal Base Clock tuning from 80MHz up to 500MHz at 1MHz increment Overclocking Protection - ASUS C.P.R.(CPU Parameter Recall) Back Panel I/O Ports 1 x External SATA 1 x S/PDIF Out (Optical) 1 x LAN(RJ45) port 8 x USB 2.0/1.1 8 -Channel Audio I/O 1 x PS/2 Keyboard (Purple) 1 x PS/2 mouse port (Green) Internal I/O Connectors 3 x USB connectors support additional 6 USB ports 1 x IDE connector 6 x SATA connectors 1 x CPU Fan connector 1 x Power Fan connector 2 x Chassis Fan connectors (1x4-pin, 1x3-pin) 1 x Front panel audio connector 1 x S/PDIF Out header 1 x CD audio in 1 x 24-pin ATX Power connector 1 x 8-pin ATX 12V Power connector 1 x System Panel (Q-Connector) 1 x MemOK! Button 1 x COM connector BIOS 16 Mb Flash ROM , AMI BIOS, PnP, DMI2.0, WfM2.0, SM BIOS 2.5, ACPI 2.0a, Multi-language BIOS, ASUS EZ Flash 2, ASUS CrashFree BIOS 3 Manageability WOL by PME,WOR by PME,PXE Accessories User's manual 1 x UltraDMA 133/100/66 cable 2 x SATA cable(s) 2 in 1 Q-connector ASUS Q-Shield Support Disc Drivers Anti-virus software (OEM version) ASUS Update ASUS Utilities Form Factor ATX Form Factor 12 inch x 8.6 inch ( 30.5 cm x 21.8 cm )