Hi when i play it looks like weird fps drops but it doesn't show on the FPS counter..I have googled and i have tried most of the things i found but nothing works...

It's rly weird because if i alt+tab out of the game for about 30 sec and then come back in to the game the weird fps drops doesn't come until i've played for like a few minutes.

The problems have nothing to do with the computer overheating. I have the latest drivers and i even tried rollbacking with no success...

Somebody help? ._. i have Nvidia gtx 275 and the fps counter is between 95-100 always