specification cpu lga775 socket for intel® core™2 extreme/core™2 quad/ core™2 duo/pentium® dual-core/celeron® dual-core /celeron® processors compatible with intel® 05b/05a/06 processors intel® 45nm multi-core cpu chipset intel® p45 / ich10r with intel® fast memory access (fma) support front side bus 1600 / 1333 / 1066 / 800 mhz memory 4 x dimm, max. 16gb, ddr2 1200 / 1066 / 800 / 667 mhz, non-ecc, un-buffered memory expansion slots 1 x pci express 2.0 x16 slot 2 x pci express x1 slots 3 x pci slots storage intel® southbridge - 6x sata 3gb/s - intel® matrix storage technology with raid 0, 1, 5 10 support marvell® 88se6111 - 1 x ultradma 133/100/66 for up to 2 pata devices silicon image® sil5723 (drive xpert technology) - 2 x sata 3gb/s - supports ez backup and super speed functions *drive xpert function is available only when the hard disk drives are set as data drives. lan pcie gb lan controller featuring ai net2 audio realtek alc1200, 8-channel high definition audio codec - support jack-detection, multi-streaming, and front panel jack-retasking - coaxial s/pdif_out ports at back i/o - asus noise-filtering ieee 1394 lsi®l-fw3227 controller supports 2 x ieee 1394a ports (one at mid-board; one at back panel) usb max. 12 usb2.0/1.1 ports(6 ports at mid-board, 6 ports at back panel) asus ai lifestyle features asus power saving solutions: - asus epu 6-engine - asus 8-phase power design - ai nap asus unique features: - asus express gate - ai direct link asus quiet thermal solutions: - asus fanless design: unique stylish heatsink - asus fan xpert asus crystal sound: - ai noise filtering asus ez diy: - asus drive xpert - asus q-shield - asus q-connector - asus o.c. profile - asus crashfree bios 3 - asus ez flash 2 overclocking features asus ai booster precision tweaker 2: - vcore: adjustable cpu voltage at 6.25mv increment - vdimm: 64-step dram voltage control - vchipset :55-step chipset voltage control - vcpu pll: 64-step cpu pll voltage control - vfsb termination: 15-step reference voltage control sfs (stepless frequency selection) - fsb tuning from 200mhz up to 800mhz at 1mhz increment - pci express frequency tuning from 100mhz up to180mhz at 1mhz increment overclocking protection: - asus c.p.r.(cpu parameter recall) special features asus mylogo 2 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 ieee1394a 1 x lan (rj45) port 6 x usb 2.0/1.1 8-channel audio i/o port internal i/o connectors 3 x usb connectors support additional 6 usb ports 1 x floppy disk drive connector 1 x ide connector 1 x tpm connector 1 x com connector 6 x sata connectors (red) 2 x drive xpert sata connectors (orange and white) 1 x cpu fan connector 2 x chassis fan connectors 1 x power fan connector 1 x ieee1394a connector front panel audio connector 1 x s/pdif out header chassis intrusion connector cd audio in 24-pin atx power connector 8 pin atx 12v power connector system panel(q-connector) bios 8 mb ami bios, pnp, dmi 2.0, wfm2.0, sm bios 2.4, acpi 3.0 manageability wol by pme, wor by pme, wor by ring, chassis intrusion, pxe accessories 1 x ultradma 133/100/66 cable 1 x fdd cable 4 x serial ata cables 1 x 2-port serial ata power cable 1 x e sata / 1394 bracket 3 in 1 q-connector asus q-shield user's manual support disc drivers express gate asus pc probe ii asus update asus ai suite anti-virus software (oem version) image-editing suite form factor atx form factor, 12"x 8.8" (30.5cm x 22.4cm)