Hi all, \r\n\r\nI am having big probs with my motherboard when using two graphics cards in sli mode. I built the computer below with one card installed initially and booting was fine, installed windows XP & drivers and device manager showed no errors. I have also updated windows xp fully and also have got latest asus and nvidia drivers. When I place the second card in black pci-e 16x slot and reboot pc it boots fine into windows (Bios Ver. 0307) but windows doesn't find/recognise second card and nvidia control panel still says 'Add A Second Card For SLI'. I have contacted ASUS who have sent me a new bios ver 0501. After installation and rebooting the computer fails to reach post, just hangs with no beeps or any action whatsoever, but remove card in black pci-e 16x slot, reset, and the pc boots fine. I have also tried archived nvidia graphics drivers and asus beta bios ver 0402 and got similar results. I have also checked the bios of both graphics cards and they are identical.\r\n\r\nSystem Components:\r\n\r\nAsus M2n-SLI Deluxe\r\nAMD Athlon 64 3500+ Retail AM2 2.0GHz, 1000MHz FSB, 512KB, 64 Bit Socket AM2\r\nArianet High Perf. 1GB DDR2 667 1GB DDR2 667 SDRAM PC2 5300\r\nPalit GeForce 7600GT 256MB DDR3 PCI-Express D-Sub and DVI (x2 hopefully!) \r\nLiteon SHW-160H6S-05C Lightscribe DVDRW\r\nSansun Black 600W PSU - 20/24pin SATA\r\nMaxtor 6G160E0 160GB 7200 RPM SATAII/300 8MB Cache - OEM\r\n\r\n\r\nCan anyone help me with my dilemma??:confused: \r\n\r\nCheers!!