cpu amd socket am2+ / am2 processors amd cool'n'quiet™ technology support cpu up to 140w amd live!™ ready chipset nvidia nforce 750a sli system bus up to 5200/mt/s ; hypertransport™ 3.0 interface for am2+ cpu 2000 / 1600 mt/s for am2 cpu memory 4 x dimm, max. 8 gb, ddr2 1066*/800/667 ecc,non-ecc,un-buffered memory dual channel memory architecture *ddr2 1066 is supported by am2+ cpu only **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 2 x pcie x16 @ dual x8 (support pcie 2.0 / 1.0 architecture ) 2 x pcie x1 2 x pci 2.2 scalable link interface (sli™) hybrid sli™ support (support windows® vista only.) vga integrated nvidia geforce® 8 series gpu hybrid sli™ support (support windows® vista only.) supports hdmi™ technology with max. resolution up to 1920 x 1200 supports dvi with max. resolution up to 1920 × 1200 @ 60 mhz supports d-sub with max. resolution up to 1920 × 1440 @ 75 hz hdmi/dvi/rgb support supports microsoft® directx 10, opengl 2.0, pixel shader 4.0 support pcie 2.0 / 1.0 architecture maximum shared memory of 512mb storage southbridge 1 xultradma 133/100 6 xsata 3 gb/s ports (use sata1-4 for ide mode.) nvidia® mediashield™ raid support raid 0,1,0+1,5,jbod lan nvidia gigabit mac realtek 8211cl gigabit phy featuring ai net 2 audio realtek® alc1200 8 -channel high definition audio codec - coaxial s/pdif out ports at back i/o - support jack detection and multi-streaming ieee 1394 lsi® fw322 controller supports 2 x 1394a ports usb 12 usb 2.0 ports (6 ports at mid-board, 6 ports at back panel) asus unique features asus express gate: - web browser, file downloading and uploading* - further free features upgradable - onboard flash with express gate installed * file downloading and uploading through usb devices only asus quiet thermal solution: - asus fanless design: heat-pipe solution - asus 4+1 phase power design - asus ai gear 2 - asus ai nap - asus q-fan 2 asus crystal sound: - asus noise filter asus ez diy: - asus q-shield - asus q-connector - asus o.c. profile - asus ez flash 2 overclocking features intelligent overclocking tools - ai overclocking (intelligent cpu frequency tuner) - asus ai booster utility precision tweaker - vdimm: 8 -step dram voltage control - vcore: adjustable cpu voltage at 0.0125v increment - vchipset 4-step chipset voltage control sfs (stepless frequency selection) - fsb tuning from 200mhz to 600mhz at 1mhz increment - memory tuning from 533mhz up to 1066mhz - pci express frequency tuning from 100mhz up to 200mhz at 1mhz increment overclocking protection - asus c.p.r.(cpu parameter recall) special features asus mylogo 2 uses 100% all high-quality conductive polymer capacitors! back panel i/o ports 1 x ps/2 keyboard 1 x hdmi 1 x ps/2 mouse 1 x s/pdif out (coaxial) 1 x ieee 1394a 1 x lan(rj45) port 6 x usb 2.0/1.1 8 -channel audio i/o internal i/o connectors 3 x usb connectors (6 ports) 1 x floppy disk drive connector 1 x ide connector 6 x sata connectors 1 x cpu fan connector 1 x chassis fan connector 1 x power fan connector 4-pin atx 12v power connector 1 x s/pdif out connector 24-pin atx power connector 1 x vga connector front panel audio connector com connector chassis intrusion connector cd/aux audio in system panel bios 8 mb flash rom dmi 2.0 pnp wfm 2.0 sm bios 2.5 award bios acpi 2.0 asus ez flash 2 accessories ultradma 133/100/66 cable fdd cable sata cables sata power cables q-shield user's manual 1 x usb module (2 prots of usb2.0) 1 x hdmi to dvi convertor 1 x sli bridge 3 in 1 q-connector support disc drivers express gate asus pc probe ii asus update anti-virus software (oem version) form factor atx form factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )