Re: SLI not working, X log says "Trouble accessing PCI Config Space"
As far as I know, SLI for Fermi cards in Linux does not work. Everytime I try with 3 GTX480's, X crashes immediatly after the login screen. With only 2 cards X will work for a bit longer, and has much more lag than with one card. If your only trying to use CUDA applications, your cards will work fine without SLI enabled. One crappy thing however, is you cannot control the fan speed for the graphics card that is not attached to the X display. (With coolbits anyway). FYI there is no overclocking support in linux, if you want to go that route a reflash will be needed.