I am using drivers 275.33 and you guys seen my other post about the performance boost, well 275.33 or the other driver works good with my setup, but decided to use the 275.33, playing 007 bloodstone at 1920xaax8 max 50-60 frames, no problems, NFS 2010 1920 max 45-60 no problems, Crysis 2 advanced 1920 with force aax2 -40-60 no problems, so i go to install Mafia 2 and it runs like total crap doesn't matter with physx on or off, pausing, skipping stuttering all over the place. Should i update my physx , would it help? Also just to note something, i remember when i was using my 5750 with mafia and i ran the game at 1280x720 (at the time on a crt ) max with physx on high and it ran smooth with no problems. Does mafia run better with AMD? I'm using 9.10.0513 so i don't see what the problem is?