specification cpu intel® socket 775 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 support intel® 45nm multi-core cpu chipset intel® p45 / ich10 with intel® fast memory access technology front side bus 1600/1333/1066/800 mhz memory 4 x dimm, max. 16 gb, ddr2 1200/1066/800/667 non-ecc,un-buffered memory dual channel memory architecture expansion slots 1 x pcie 2.0 x16 2 x pcie x1 3 x pci storage southbridge 6 xsata 3 gb/s ports marvell 88se6102 1 x ultradma 133/100/66 for up to 2 pata devices lan atheros l1e gigabit lan controller featuring ai net 2 audio realtek alc 1200, 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 usb 12 usb 2.0 ports (6 ports at mid-board, 6ports at back panel) asus unique features asus power saving solution: - asus epu- 4 engine - asus ai nap asus exclusive features: - asus express gate asus quiet thermal solution: - asus fanless design: heatsink solution - asus fan xpert asus ez diy: - asus q-connector - asus o.c. profile - asus crashfree bios 3 - asus ez flash 2 overclocking features intelligent overclocking tools: - asus ai booster utility precision tweaker: - vcore: adjustable cpu voltage at 6.25mv increment - vdimm: 5-step dram voltage control sfs (stepless frequency selection) - fsb tuning from 200mhz up to 800mhz at 1mhz increment - memory tuning from 667mhz up to 1333mhz for ddr2 - 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 port 1 x ps/2 mouse port 1 x s/pdif out (coaxial) port 1 x rj45 port 6 x usb 2.0/1.1 ports 8-channel audio i/o ports internal i/o connectors 3 x usb connectors support 6 additional usb ports 1 x floppy disk drive connector 1 x ide connector 1 x com connector 6 x sata connectors 1 x cpu fan connector 1 x chassis fan connector 1 x power fan connector front panel audio connector 1 x s/pdif out header chassis intrusion connector cd audio in 24-pin atx power connector 1 x 4-pin atx 12v power connector 1 x tpm header system panel(q-connector) bios 8 mb flash rom, ami bios, pnp, dmi2.0, wfm2.0, sm bios 2.3, acpi 2.0a, asus ez flash 2, asus crashfree bios 3 manageability wfm 2.0, dmi 2.0, wol by pme, wor by pme, pxe accessories 1 x ultradma 133/100/66 cable 1 x fdd cable 2 x serial ata cables 1 x 2-port serial ata power cable i/o shield user's manual 2 in 1 q-connector support disc drivers asus pc probe ii asus update express gate asus ai suite anti-virus software (oem version) form factor atx form factor 12 inch x 7.6 inch ( 30.5 cm x 19.3 cm )