CPU AMD Socket AM3 ;PhenomII /AthlonII /Sempron 100 Series Processors AMD 140W CPU Support AMD Cool 'n' Quiet Technology Support 45nm CPU Chipset AMD 790FX/SB750 System Bus Up to 5200 MT/s ; HyperTransport 3.0 Memory 4 x DIMM, Max. 16 GB, DDR3 1600(O.C.)/1333/1066 ECC,Non-ECC,Un-buffered Memory Dual Channel memory architecture Expansion Slots 4 x PCIe 2.0 x16 , support ATI CrossFireX technology (@ dual x16, triple x16 / x8 / x8, or quad x8 link) 2 x PCI 2.2 Storage SB750 Chipset 1 xUltraDMA 133/100/66 for up to 2 PATA devices 5 xSATA 3 Gb/s ports Support RAID 0,1,5,10,JBOD 1 x eSATA 3Gb/s ports (SATA on-the-go) LAN Realtek 8112 Gigabit LAN controller featuring AI NET 2 Audio Realtek 1200 8-Channel High Definition Audio CODEC - Supports Jack-Detection, Multi-Streaming, and Front Panel Jack-Retasking - Coaxial / Optical S/PDIF Out ports at back I/O - ASUS Noise Filtering IEEE 1394 VIA VT6315N controller supports 2 x 1394a port(s) (1 at mid-board; 1 at back panel) USB 12 USB 2.0/1.1 ports (6 ports at mid-board, 6 ports at back panel) ASUS Unique Features ASUS Power Saving Solutions: - 8+2 Phase Power Design - ASUS Anti-Surge Protection ASUS Green Design: - EPU *ASUS EPU is supported by AM3/AM2+ CPU only - ASUS AI Nap Express Gate ASUS Quiet Thermal Solution: - ASUS Fanless Design: Heat pipe solution - ASUS Fanless Design: Stack Cool 2 - ASUS Q-Fan 2 ASUS EZ DIY: - ASUS Q-Shield - ASUS Q-Connector - ASUS O.C. Profile - ASUS CrashFree BIOS 2 - ASUS EZ Flash 2 - Onboard Switch Overclocking Features Intelligent overclocking tools - AI Overclocking (intelligent CPU frequency tuner) - ASUS Turbo Key - ASUS TurboV Precision Tweaker 2 - vDIMM: 50 -step DRAM voltage control - vCore: Adjustable CPU voltage at 0.0125V increment - vChipset (N.B.): 16-step voltage control SFS (Stepless Frequency Selection) - FSB tuning from 200MHz up to 600MHz at 1MHz increment - PCI Express frequency tuning from 100MHz up to 150MHz at 1MHz increment Overclocking Protection - ASUS C.P.R.(CPU Parameter Recall) Special Features True SATA 6Gb/s & USB 3.0 support 100% All High-quality Conductive Polymer Capacitors!(VRM 5000hrs lifespan @105°C, 500000hrs @65°C, lifespan at 65°C) ASUS MyLogo 2 AMD OverDrive Support* * Advanced cooling system is required when advanced overclock functions of AMD OverDrive are enabled. Back Panel I/O Ports 1 x PS/2 Keyboard 2 x PS/2 Mouse 1 x External SATA 1 x IEEE 1394a 1 x LAN(RJ45) port 6 x USB 2.0/1.1 8 -Channel Audio I/O 1 x S/PDIF Out port (Coaxial) 1 x S/PDIF Out port (Optical) 2 x USB 3.0 ports(@ U3S6 card) Internal I/O Connectors 3 x USB connectors support additional 6 USB ports 1 x Floppy disk drive connector 1 x IDE connector 5 x SATA connectors 1 x IEEE 1394a connector 1 x CPU Fan connector 2 x Chassis Fan connector 1 x Power Fan connector 1 x COM connector 2 x SATA 6Gb/s connectors (@ U3S6 card) Front panel audio connector 1 x S/PDIF Out header Chassis Intrusion connector CD audio in 24-pin ATX Power connector System Panel (Q-Connector) 8-pin ATX 12V Power connector Power on Switch Reset Switch BIOS 8 Mb Flash ROM , AMI BIOS, PnP, DMI 2.0, SM BIOS 2.5, ACPI 2.0a, ASUS EZ Flash 2, CrashFree BIOS 2 Manageability WOL by PME,WOR by PME,WOR by Ring,Chasis Intrusion,PXE Accessories 1 x UltraDMA 133/100/66 cable 1 x U3S6 card 2 x SATA 6Gb/s cables 2 x SATA 3Gb/s cables 1 x Multi-functional module (1-port IEEE 1394a + 2-port USB2.0) 2 x ASUS CrossFire bridge cables 1 x Q-Shield 1 x 2 in 1 Q-connector (USB, System panel; Retail version only) 1 x User's manual & Support DVD for U3S6 1 x User's manual & Support DVD for M4A785TD-V EVO Support Disc Drivers ASUS PC Probe II Express Gate ASUS AI Suite Anti-virus software (OEM version) ASUS Update AMD OverDrive Utility (AOD) Form Factor ATX Form Factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm ) Try to set a system restore point before installing a device driver. This will help if you installed a wrong driver. Problems can arise when your hardware device is too old or not supported any longer.