I JUST GOT MY 295 AND AM RUNNING oops caps lock 181.71 beta drivers with windows 7 and it wont run the os perf test or futuremark but work just fine in the games so my guess is that nothings wrong if that is your only problem
thanks for all the help you guys/gals from this forum.
it is the power supply.
i replaced the raidmaxx junk with the enermax revolution 85+ 1050ewt and it works great now.
the vista performance test went like a breeze and 5.9 all the way through the chart.
i bought another gtx 295 to make twin setup, it seems to perform the same as single setup.