Originally posted by: mattdbrown
I have a system set up with the A8N-SLI and 2 HP NVidia Quadro 3400s. Everything appears to be working fine hardware wise: each time I boot into Windows, I am even prompted to activate the SLI multi-gpu mode. The weird problem is this: whenever I attempt to activate multi-gpu mode, the setting change doesn't stick. The computer doesn't restart, and if I go back into the menu, it looks as if I had never changed the setting. I have tried it with every version of NVidia drivers that I could find... and still no luck. Has anyone else had this problem and been able to resolve it? Can anyone suggest something else to try? I'm really stuck here. Thanks a lot.
Could it be possible that the nvidia drivers or the BIOS aren't recognizing the SLI capabilities of the Quadros at startup?
According to this page, only the 6600GTs, 6800 Ultras and 6800GTs are compatible.