8GB, DDR2-800/667/533, non-ECC and un-buffered memory* pass on to www.Asus.Com or client guide for remembrance QVL (Qualify Vendor List)SLI-Ready Memory 1200MHzExpansion Slots 2 x PCI extract x16 slot, bear out NVIDIA SLI expertise, at complete x16, x16 speed(blue)1 x PCI extract x16, at x8 speed(middle)1 x PCI extract x12 x PCI 2.2Scalable relate edge (SLI) Support two one and the same NVIDIA SLI-Ready graphics cards (both at x16 mode)ASUS PEG LinkStorage South channel supports:- 1 x specially DMA 133 / 100 / 66 / 33- 6 x serialization ATA 3.0Gb/s- NVIDIA MediaShield RAID ropes RAID 0, 1, 0 1, 5 and JBOD span irritable serialization ATA drivesSilicon illustration 3132 SATA controller supports- 2 x peripheral serialization ATA 3.0Gb/s docks on backward I/O (SATA On-the-Go)LAN NVIDIA nForce 680i SLI built-in dual Gigabit MAC in addition to peripheral Marvell PHYSupport NVIDIA DualNet technologyHigh explanation Audio SupremeFX Audio Card- ADI 1988B 8-channel excessive explanation Audio CODEC- bear out Jack-Sensing, record, Multi-streaming and Jack-Retasking- racket FilterCoaxial, Optical S/PDIF outDTS ConnectASUS Array MicIEEE 1394a VIA6308P controller ropes 2 x 1394a portsUSB max. 10 USB2.0/1.1 ports(6 ports at mid-board, 4 ports at backward panel)Overclocking Features Extreme TweakerIntelligent overclocking tools:- AI NOS (Non-delay Overclocking System)- AI Overclocking (intelligent CPU frequency tuner)- ASUS AI shot Utility- O.C ProfileOverclocking Protection:- ASUS C.P.R.(CPU Parameter Recall)Special Features LCD PosterEL I/OOnboard LEDOnboard Switches: sovereign state / Reset / Clr CMOSQ-ConnectorQ-Fan PlusASUS EZ Flash2ASUS harmony AlarmASUS MyLogo3Back Panel I/O Ports 1 x LCD Poster1 x PS/2 piano port(purple)1 x PS/2 Mouse port(green)1 x Optical 1 x Coaxial S/PDIF Output2 x peripheral SATA2 x LAN (RJ45) port4 x USB 2.0/1.1 ports1 x IEEE1394a port1 x onboard LED switchInternal I/O Connectors 3 x USB 2.0 connectors ropes added 6 USB 2.0 ports1 x Floppy floppy disk set in motion connector1 x IDE connector for two devices6 x SATA connectors8 x Fan connector: 1 x CPU / 1 x SPS / 3 x armature / 3 x Optional3 x thermal feeler connector1 x IEEE1394a connector1 x S/PDIF amount produced connector1 x armature imposition connector24-pin ATX sovereign state connector8-pin ATX 12V sovereign state connector1 x EL I/O defend ConnectorSystem panel connectorBIOS 8Mb verdict BIOS, PnP, DMI2.