I have the following problem: I have two Geforce 6800 videocards which ran in my SLI setup fine until recently. I exchanged the power supply from an Enermax 500W to a Yesico fanless 550W psu. Since then I can not get the videocards running anymore. I changed back the psu but the problem remains. When I place both videocards, I do not get a signal to my monitor when I connect the vga connector to the first (blue slot) videocard. The system boots up fine and I get no error messages (voice or bios beeps). When I change the vga connector to the second card, I do get a working signal. I swapped the videocards, but still the same result. In Windows, I only see one videocard (I now have both cards installed with the vga connecter connected to the second card) When I put in one videocard in the first slot and set up the system to a single GPU setting, I get a working signal, with either videocard. I have reset the bios, checked the EZ-board, connected the extra power supply input on the motherboard, placed the SLI connector over the cards and I can think of no further options. Could any of you please give me more advise on what to do? My specs are the following: A8N-SLI Deluxe Athlon 64 3200+ 2 x Corsair 512 MB RAM Enermax ALT500W PSU 2 x Geforce 6800 videocards No further unusual components connected.
It is possible the psu has damaged the board, I read of a simular fault on another forum some time ago. Try your cards in another SLI board if you have one or a mates. Failing that try reinstalling Windows.
