Penumbra Requiem low FPS on good pc

[plutomaniac]

Although I can solve many problems this ones seems...unneeded, especially on my pc. It is a good pc but for some reason Penumbra Requiem lags very much since today at where I left the game. When I turn around the FPS goes to 10 or 8 when normally it is at 60(Vsync on). Here is a small video and also the HPL.log file of Requiem(attached).





I have Nvidia Geforce GXT 460 OC2 (a.k.a: highly overclocked) with the latest drivers (275.33) and everything else on my system updated(including OpenAL and stuff like that). I am using Windows 7 Ultimate x64 SP1.

All the graphics options are topped of course and I have tried running the game as administrator(the idea came from an error at the log about restrictions probably).

Note: While playing Overture, Black Prague and half Requiem I had no such problems. Also, the game is fully updated.