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 supports 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 1200/1066/800/667mhz, non-ecc, un-buffered memory dual channel memory architecture expansion slots 2 x pci express 2.0 x16 slots, support ati crossfirex™ technology at x8 link (pcie x16_1 blue, pcie x16_2 black*) 1 x pci express x16 slot at max. x4 link(black) 2 x pci express x1 slots 2 x pci slots *pci express x16_2 slot (black at max. x8 link) crossfire support ati crossfirex™ technology, up to quad crossfirex storage southbridge - 6 x sata 3gb/s - intel® matrix storage technology with raid 0, 1, 5, 10 support marvell 88se6121 - 1 x ultradma 133/100/66 for up to 2 pata devices - 1 x external sata 3gb/s port (sata on-the-go) 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 dual gigabit lan controllers marvell 88e8056/88e8001® gigabit lan controller featuring ai net2,teaming and redundant audio adi® ad2000b 8-channel high definition audio codec - support jack-detection, multi-streaming, and front panel jack-retasking - coaxial/optical 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. 10 usb2.0/1.1 ports(4 ports at mid-board, 6 ports at back panel) asus unique features asus exclusive features: - asus true 16-phase power design - express gate ssd asus power saving solutions: - asus epu-6 engine - asus ai nap asus quiet thermal solutions: - asus fanless design: heat pipe solution - asus fanless design: stack cool 2 - asus fan xpert asus crystal sound: - ai audio 2 - asus noise filtering asus ez diy: - asus drive xpert - asus diehard bios - asus q-shield - asus q-connector - ai direct link - asus o.c. profile - asus ez flash 2 - onboard switch overclocking features asus ai booster precision tweaker 2: - core: adjustable cpu voltage at 0.00625v increment -vdimm: 64-step dram voltage control - chipset (nb): 55-step dram voltage control - cpupll: 64-step reference voltage control - fsb termination: 40-step voltage control sfs (stepless frequency selection) - fsb tuning from 200mhz up to 800mhz at 1mhz increment - pci express frequency tuning from 100mhz up to 180mhz at 1mhz increment overclocking protection: - asus c.p.r.(cpu parameter recall) special features asus mylogo 3 back panel i/o ports 1 x ps/2 keyboard/mouse combo port 1 x optical + 1 x coaxial s/pdif output port 1 x external sata port 1 x ieee1394a port 2 x lan (rj45) ports 6 x usb 2.0/1.1 ports 8-channel audio i/o ports internal i/o connectors 2 x usb connectors support additional 4 usb ports 1 x floppy disk drive connector 1 x ide connector 1 x com connector 1 x tpm connector 6 x sata connectors (red) 2 x drive xpert sata connectors (orange) 1 x cpu fan connector 3 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 power on switch reset switch system panel (q-connector) bios 16mb ami bios, pnp, dmi2.0, wfm2.0, 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 8 x serial ata cable 2 x 2-port serial ata power cable 1 x 2-port usb and 1-port 1394 (4-pin) module 1 x q-shield 1 x user's manual 1 x optional fan 1 x 3 in 1 q-connector (retail version only) support disc asus pc probe ii asus update asus ai suite anti-virus software (oem version) image-editing suite form factor atx form factor, 12"x 9.6" (30.5cm x 24.4cm)