description : cpu amd socket am2+ processors amd phenom™ fx / phenom / athlon™ / sempron™ amd socket am2 for amd athlon 64 x2 / athlon 64 fx / athlon 64 / sempron amd cool'n'quiet™ technology chipset nvidia nforce® 780a 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 *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 3 x pcie 2.0 x16 support nvidia sli tech @ dual x16 or 3-way@x8, x8, x 8 2 x pcie x1 2 x pcie1.0 x1, pciex1_1 (black) is compatible with audio slot vga integrated graphics 512mb maximum shared memory of mb supports hdmi™ technology with hdcp compliant with max. resolution 1920 x 1200 supports d-sub with max. resolution 1920 × 1440 @ 75 hz multi vga output support: dvi & d-sub hybrid sli support scalable link interface (sli™) support nvidia hybrid sli-ready graphics cards storage southbridge 1 xultradma 133/100/66/33 6 xsata 3 gb/s ports support raid 0,1,0+1,5,jbod lan dual gigabit lan, both featuring ai net2 audio supremefx ii audio card adi 1988b 8 -channel high definition audio codec coaxial / optical s/pdif out ports at back i/o asus noise filter ieee 1394 2 x 1394a ports (1 port at back i/o, 1 port onboard) usb 12 usb 2.0 ports (6 ports at mid-board, 6 ports at back panel) overclocking features extreme tweaker new 8+2 phase power design intelligent overclocking tools - cpu level up - ai overclocking (intelligent cpu frequency tuner) - asus ai booster utility - o.c profile overclocking protection< - cop ex (component overheat protection ex) - voltiminder led - asus c.p.r.(cpu parameter recall) special features lcd poster rog bios wallpaper onboard switches: power / reset / clr cmos(at rear) q-connector asus ez flash2 asus crashfree bios2 stack cool 2 asus q-shield asus mylogo3 uses 100% all high-quality conductive polymer capacitors! back panel i/o ports 1 x d-sub 1 x ps/2 keyboard 1 x hdmi 1 x ieee 1394a 2 x lan(rj45) port 6 x usb 2.0/1.1 1 x clr cmos switch 1 x optical + 1 x coaxial s/pdif output internal i/o connectors 3 x usb connectors support additional 6 usb 2.0 ports 1 x floppy disk drive connector 1 x ide connector 6 x sata connectors 1 x ieee 1394a connector 1 x cpu fan connector 3 x chassis fan connector 1 x power fan connector 3 x thermal sensor connectors 1 x s/pdif out connector 1 x8-pin atx 12v power connector 24-pin atx power connector 1 x en/dis-able clr cmos connector 1 x lcd poster chassis intrusion connector system panel bios 8 mb flash rom dmi 2.0 ami bios pnp wfm 2.0 sm bios 2.4a acpi 2.0a multi-language bios manageability wol by pme,wor by pme,chasis intrusion,pxe accessories 3-way sli bridge sli bridge hdmi/dvi converter asus optional fan 3 in 1 asus q-connector kit ultradma 133/100/66 cable floppy disk drive cable sata cables sata power cables 2-port usb2.0 module+ieee1394a module asus q-shield cable ties user's manual support disc the hottest dx10 game: company of heroes:opposing fronts support dvd: drivers asus pc probe ii asus update asus ai suite futuremark ® 3dmark® 06 advanced edition kaspersky® anti-virus image-editing software form factor atx form factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )