I couldn't even start the game properly (about 1FPS). Just to confirm - indeed the BETA 275.27 without 3D Vision worked for me. A bit slow with ubersampling enabled, just fine without ubersampling (everything else - ultra high). I didn't check the exact framerate, though.

i5-2500
nVidia 570
8G RAM
Win7x64
Dell 24"@1920x1200

Thanks for posting and for the answers, I don't find the thread redundant. Posting your PC's specs also helped. It's good to compare the performance in this regard. At least, one knows what to expect even after fixing the 2 known issues.

@kobriel Ubersampling still gives you touble?

Wow!

Ok, now i know what to take off. If your computer can't then I definitely can't

Thanks for posting your specs. I did everything (no 3d vision, beta drivers) and I only saw a small boost in fps. Thanks again, hopefully removing ubersampling works so i don't have to play it in high or medium

I'd say these two could be responsible.
So far, most complaints I've seen of seriously poor performance have one thing in common, aging middle-performance dual-core CPUs.

I'm running a Core 2 Quad 9550, and I still get the feeling some aspects are a tad CPU-bottlenecked.

Your 2GB RAM probably aren't helping either. 2GB might get you by if the rest of your PC happens to be fresh and well optimised, with no virus-checkers/firewalls/etc/etc sitting in memory, but in practice I suspect 4GB would be a safer bet for a comfortable gaming experience, without dropping into disk-swapping land every five minutes.

Minimum requirements are 2GB ram so you cant dumb all guilt to that one. Also i have a huge paging ( 4gb ) so its like 4gb of memory.( not exactly, but very similar )

Minimum requirements - as in "might get you by if the rest of your PC happens to be fresh and well optimised". It's a bare minimum.
Paging is not something you want, ever! If you suspect you're having to make use of the page file even occasionally, it's a red-flag that you need to double your RAM asap.
Paging can and will knock your performance to sub-10% of its potential... you cannot run out of RAM and expect to still play games.

I've got a q6400, 4 gigs, and a GTX460 and mine runs smooth as silk on high+ settings. Something's up with your drivers, other processes running, or something.