I have a quad core 3.2ghz processor, 6 gigs ddr3 ram, and a 512mb nvidia 8500 gt gpu.I get terrible framrates on most games that I play,all drivers up to date,everything I can think to work on,I have.I used to play L4D just fine on an older,much less decent system with windows xp,and it had the same video card i have in my new system.So what is the catch? Could it be some confliction with my new windows 7 system?