dunno wtf is going on then
I run the game on full settings with a radeon 6800, 4 gigs of ddr2 ram (slow old ram), and a 6 core 2.6 GHZ proccesor.
In the biggeset battles i can get a little bit of lag, but even as a sniper its still perfectly playable. You gota upgrade your Proccesor, you may think what you have is good but its not your CPU is especially bad, the computer i had like 7 years ago had a dual core 3.0ghz which is alot better than what you have now. Best part is neither my proccesor or card was expensive when i bought em a year ago, if your in a decent financial situation you should have no problem affording new stuff. I have also heard that this game is particuarlly proccesor intensive. And i know in the psat i have had a really bad proccesor that was bottlenecking a good card. Or i assume your card is good i dont know Nvida i stopped buying them cause they kept buring out in 6 months.
EDIT: Also casimir your card is bad, i assume your CPU is too. So upgradeing will help you too if you want to.