Lagg

[sharpshootertrig]

OK, so i start playing PR 0.95 i crash and crash, then when i actualy get to play, it laggs like hell over time.
At first its fine, i get 50-70 constant fps (like i used to) but now it starts to drop and drop, and within 15 minutes i am lagging at 10-25 fps.
specs: Intel core 2 quad 2.66
Nvidia GTS 250 1GB
4GB corsair RAM
750 GB HD
700W PSU
win7 32 bit (**** OS)

and i can run ArmA 2 and Bad Company 2 on high=very high
It makes no sense i have been waiting months for this release :'(
I would really appreciate help.