Well you can test that by uninstalling SP1.

How to uninstall Windows Vista SP1 as a troubleshooting step

ok, i will ill do that and let you know how it goes.

Also you might try installing a slightly older version of the video drivers instead of the newest ones. I've had to do that for hardware compatibility related to my card. However the problem might be SP 1 especially if there was no problem before installing SP 1, but it could be hard to tell if you did both at the same time. Just thought that I'd throw that out.

Hey,

I dont know if this thread is still active, but i have the same set-up and i cannot get Sli to work, the option doesnt come up in nVidia control panel and the second g-card in device manager says "This device cannot find enough system resources". My g-cards are BFG although that shouldn't matter because they are sli ready. Any suggestions ?