I've seen some sites do some reviews on running games in both x64, vista, and 7 and have noticed that the fps isn't too far off in all of them respectively. I run counter strike source on x64 at max settings in nvidia control panel and average about 190fps. In windows 7 64bit, using the exact same nvidia override settings, I get only around 90-100fps on average. What is causing the drastic drop off? Any ideas? Both games are running on DX9.0c since CS:S doesn't support anything higher. I also have the latest drivers for both OS's.