I have to agree, XP does a better job at keeping the game up at normal speeds with AA/Filtering on than Windows 7 x64 7600.
The latest beta drivers from Nvidia came out like a day or so a go (190.30). Try those out and see if it's any better.
I noticed that it did get a little bit better with high settings, but it can still slow down when there's a lot of things on the screen.
The number one culprit that I've also noticed is vsync. I recommend turning it off for now, or let your video card's control panel to force the vsync upon your apps. Turning vsync on with fullscreen can make the game crawl on its knees.
To give you an idea of my PC, here's a brief look:
Windows 7 x64 7600
Nvidia GeForce 9800 GTX+ (overclocked - 780/2000/2400)
CPU - Wolfdale Intel Core 2 E8400 3.00GHZ (Overclocked to 4.2GHZ)
4GB Memory
The latest beta drivers from Nvidia came out like a day or so a go (190.30). Try those out and see if it's any better.
I noticed that it did get a little bit better with high settings, but it can still slow down when there's a lot of things on the screen.
The number one culprit that I've also noticed is vsync. I recommend turning it off for now, or let your video card's control panel to force the vsync upon your apps. Turning vsync on with fullscreen can make the game crawl on its knees.
To give you an idea of my PC, here's a brief look:
Windows 7 x64 7600
Nvidia GeForce 9800 GTX+ (overclocked - 780/2000/2400)
CPU - Wolfdale Intel Core 2 E8400 3.00GHZ (Overclocked to 4.2GHZ)
4GB Memory