CPU Intel Socket 1155 for Intel 2nd Generation Core i7 Processor/Core i5 Processor/Core i3 Processor/ Support Enhanced Intel SpeedStep Technology (EIST) Supports Intel Turbo Boost Technology 2.0 Chipset Intel P67 Express Chipset Memory 4 x DIMM, Max. 32 GB, DDR3 2200(O.C.)*/2133(O.C.)*/1866(O.C.)/1600(O.C.)/1333/1066 Non-ECC,Un-buffered Memory Dual Channel memory architecture Expansion Slots 2 x PCIe 2.0 x16 slots (Single@x16 or dual@x8/x8 mode or dual@x16/x1 mode) 1 x PCIe 2.0 x16 slot (black, max.@x4 mode, compatible with PCIe x 1 and x4 devices) 1 x PCIe 2.0 x1 slot Storage Intel P67 Express Chipset 4 xSATA 3.0 Gb/s ports (blue) 2 xSATA 6.0 Gb/s ports (gray) Intel Rapid Storage Technology Support RAID 0,1,5,10 Marvell PCIe SATA 6Gb/s controller 1 xExternal SATA 6.0 Gb/s port 1 xSATA 6.0 Gb/s port (navy blue) LAN Realtek RTL8111E Gigabit LAN controller Audio Realtek ALC892 8-Channel Audio CODEC supports DTS Surround Sensation UltraPC - Optical S/PDIF Out port at back I/O - Supports Jack-Detection, Multi-streaming, Front Panel Jack-Retasking(HD only) IEEE 1394 VT6315N controller supports 2 x 1394a port(s) (1 port at mid-board, 1 port at back panel) USB Chipset built-in - 2 x USB 3.0/2.0 ports (blue, at back panel) Chipset built-in - 14 x USB 2.0/1.1 ports (8 ports at mid-board, 6 ports at back panel) ASUS Unique Features - 100% All High-quality Conductive Polymer Capacitors - TPU - ASUS Turbo V - Auto Tuning - Anti-Surge Protction - Mem OK! - ASUS EPU - CrossFireX Support - SLI Support - Protect 3.0 - AI Suite II - ASUS CrashFree BIOS 3 - ASUS EZ Flash 2 - ASUS MyLogo 2 Overclocking Features SFS (Stepless Frequency Selection) - Internal Base Clock tuning from 80MHz up to 300MHz at 1MHz increment Overclocking Protection - ASUS C.P.R.(CPU Parameter Recall) Back Panel I/O Ports 1 x PS/2 Mouse 1 x PS/2 Keyboard 1 x External SATA 1 x IEEE 1394a 1 x LAN(RJ45) port(s) 2 x USB 3.0/2.0 6 x USB 2.0/1.1 1 x S/PDIF Out (Optical) 8 -Channel Audio I/O Internal I/O Connectors 4 x USB connectors support additional 8 USB ports 1 x MemOK! Button 1 x TPM connector 3 x SATA 6.0Gb/s connectors 4 x SATA 3.0Gb/s connectors 1 x IEEE 1394a connector 1 x CPU Fan connector(s) 2 x Chassis Fan connector(s) 1 x Power Fan connector(s) 1 x LPT connector 1 x TPU switch 1 x S/PDIF Out connector 1 x 24-pin ATX Power connector 1 x 8-pin ATX 12V Power connector 1 x Front panel audio connector 1 x COM connector 1 x System Panel connector BIOS 32 Mb Flash ROM , EFI AMI BIOS, PnP, DMI2.0, WfM2.0, ACPI v2.0a, SM BIOS v2.6, Multi-language BIOS Accessories User's manual 2 x SATA 3.0Gb/s cables 2 x SATA 6.0Gb/s cables 1 x Q-Shield 1 x Q-Connecor (retail version only) Support Disc Drivers Anti-virus software (OEM version) ASUS Update ASUS Utilities Support DVD Form Factor uATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )