CPU	Intel Socket 1156 Core i7 Processor/Core i5 Processor/Core i3 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 Lidts).
Expansion Slots	2 x PCIe 2.0 x16 (single at x16 or dual at x8 / x8 mode) 3 x PCIe 2.0 x1 (2 at 5GT/s [blue]; 1 at 2.5GT/s [gray]) 2 x PCI
Multi-GPU Support	Supports NVIDIA Quad-GPU SLI Technology 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 JMB363 PATA and SATA controller 1 xUltraDMA 133/100/66 for up to 2 PATA devices 1 xExternal SATA 3Gb/s port 1 xSATA 3Gb/s port (black) Marvell PCIe SATA6Gb/s controller: - 2 x SATA 6.0 Gb/s ports (Gray)
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 - Supports Jack-Detection, Multi-streaming, Front Panel Jack-Retasking - Coaxial / Optical S/PDIF out ports at back I/O
IEEE 1394	VIA 6308P controller supports 2 x 1394a port(s) (one at mid-board; one at back panel)
USB	NEC USB 3.0 controller - 2 x USB 3.0 ports (Blue, at back panel) Intel P55 Express Chipset - 12 x USB 2.0 ports (6 ports at mid-board, 6 ports at back panel)
ASUS Unique Features	Unique PCIe X4 Chip for Ultra Performance - True USB 3.0 Support - True SATA 6Gb/s Support ASUS Xtreme Design: ASUS Hybrid Processor - TurboV EVO - Auto Tuning, TurboV , CPU Level UP and Turbo Key ASUS 16 Hybrid Phase - T.Probe Technology for Active Cooling - 12+2 Phase Power Design * 16 Hybrid Phase = 12+2 Phase x T.Probe ASUS Hybrid OS - Express Gate ASUS Exclusive Features - MemOK! - ASUS EPU ASUS Quiet Thermal Solution - ASUS Fanless Design: Stylish Heatsink - ASUS Fanless Design: Stack Cool 3 - ASUS Fan Xpert ASUS Crystal Sound - ASUS Noise Filter ASUS EZ DIY - ASUS Q-Shield - ASUS Q-Connector - ASUS O.C. Profile - ASUS CrashFree BIOS 3 - ASUS EZ Flash 2 - ASUS MyLogo 2 - Multi-language BIOS ASUS Q-Design - ASUS Q-LED (CPU, DRAM, VGA, Boot Device LED) - ASUS Q-Slot - ASUS Q-DIMM
Overclocking Features	Precision Tweaker 2 - vCore: Adjustable CPU voltage at 0.00625V increment - vIMC: Adjustable IMC voltage at 0.00625V increment - vDRAM Bus: 104-step DRAM voltage control - vPCH: 36-step chipset voltage control - vCPU_PLL: 56-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 PS/2 Keyboard (Purple) 1 x PS/2 mouse port (Green) 1 x Coaxial S/PDIF Output 1 x Optical S/PDIF Output 1 x IEEE1394a 1 x eSATA port 1 x RJ45 port 2 x USB 3.0/2.0 ports (blue) 6 x USB 2.0/1.1 ports 8-channel Audio I/O
Internal I/O Connectors	3 x USB connectors support additional 6 USB ports 1 x IDE connector 1 x IEEE 1394a connector 1 x CPU Fan connector 1 x Power Fan connector 7 x SATA 3.0Gb/s connectors (blue/black) 2 x SATA 6.0Gb/s connectors (gray) 2 x Chassis Fan connector (1x4-pin, 1x3-pin) Front panel audio connector 1 x S/PDIF Out Header 24-pin ATX Power connector 1 x 8-pin ATX 12V Power connector System Panel(Q-Connector) 1 x MemOK! button
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	WfM 2.0,DMI 2.0,WOL by PME,WOR by PME,PXE
Accessories	User´s manual 1 x UltraDMA 133/100/66 cable 2 in 1 Q-connector 2 x Serial ATA 3.0Gb/s cables 2 x Serial ATA 6.0Gb/s cables 1 x 2-port USB and eSATA module 1 x SLI Bridge ASUS Q-Shield
Support Disc	Drivers Anti-virus software (OEM version) ASUS Update ASUS Utilities
Form Factor	ATX Form Factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )