Low FPS in Team Fortress 2

[Hazard]

Hi,

I have a Q6600 CPU clocked @ 2.4 ghz
GTX 260 graphics card, ( i overclocked it, but other games work fine
2gb ram

Until 3 months ago TF2 worked just fine almost maxing the 60 fps limit.
Suddenly in SLIGHTLY intense moments im lucky if i get 5 - 10 fps!!
please help

As a '' benchmark '' i Play resident evil 5 and my FPS are 55 - 60.

 

[daisyallen123]

That running the game at my monitors maximum resolution yields the highest framerate. I know people will probably jump all over me for this, on the other hand I will tried tf2 at various 16x10 resolutions and unless I am running it at 1920x1200 my framerate drops to 40-50fps as opposed to a solid 60 or above.At idle cores run at 49c and 47c, under gameplay they dont go above 55c.