specification cpu intel socket 775 processors 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 supports intel® 45nm multi-core cpu chipset intel p45 / ich10r front side bus 1600/1333/1066/800 mhz memory 2 x dimm, max. 8 gb, ddr3 1333/1066/800 non-ecc,un-buffered memory 4 x dimm, max. 16gb, ddr2 1066 / 800 / 667 mhz, non-ecc, un-buffered memory dual channel memory architecture when installing total memory of 4gb capacity or more, windows® 32-bit operation system may only recognize less than 3gb. hence, a total installed memory of less than 3gb is recommended expansion slots 1 x pcie 2.0 x16 3 x pcie x1 2 x pci storage southbridge 6 xsata 3 gb/s ports intel® matrix storage technology support raid 0,1,5,10 marvell 88se6111 1 x ultradma 133/100/66 for up to 2 pata devices silicon image sil5723 (drice expert techology) 2 x sata 3.0 gb/s supports ez backup and superspeed functions lan pcie gigabit lan controller featuring ai net2 audio realtek alc 1200, 8 -channel high-definition audio codec - support jack-detecting, multi-streaming, and front panel jack-retasking - coaxial s/pdif out ports at back i/o - asus noise-filtering ieee 1394 1394a controller supports 2 x 1394a ports usb 12 usb 2.0 ports (6 ports at mid-board, 6 ports at back panel) asus ai lifestyle features asus power saving solution: - asus epu-six engine - asus 3rd generation 8-phase power design - asus ai nap ai lifestyle features: - express gate - asus mylogo 2 asus quiet thermal solution: - asus fanless design: stylish heatsink - asus fan xpert asus ez diy: - asus drive xpert - asus ai direct link - 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 (n.b.): 40-step dram voltage control - vcpupll: 64-step reference voltage control - vfsb termination: 15-step hyper transport 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 - memory tuning from 800mhz up to 2000mhz for ddr3 - pci express frequency tuning from 100mhz up to180mhz 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 s/pdif out (coaxial) 1 x ieee1394a 1 x rj45 port 6 x usb 2.0/1.1 8-channel audio i/o 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 com connector 6 x sata connectors 2 x drive xpert sata connectors 1 x cpu fan connector 2 x chassis fan connector 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 flash rom dmi 2.0 ami bios pnp wfm 2.0 sm bios 2.4 manageability wol by pme, wor by pme, wor by ring, chasis intrusion, pxe accessories 1 x ultradma 133/100/66 cable 1 x fdd cable 6 x serial ata cables 1 x 2-port serial ata power cable 1 x multi-function module ( 1 port esata and 1 port 4-pin 1394) 1 x q-shield 1 x user's manual 1 x 3 in 1 q-connector support disc drivers asus pc probe ii asus update asus ai suite anti-virus software (oem version) image-editing suite form factor atx form factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )