FPS problem Requiem

[Nando]

Hi there,

I have been playing penumbra requiem but now I can't continue since I'm getting less than 1 FPS upon starting the "Power Station" level.

I have:
- Restarted and finished the previous level
- Quicksaved and loaded in the power station level
- Restarted the game and loaded the power station level
- Turned down most graphics settings (was never a problem before)

but the problem persists.

My setup:
Penumbra Requiem (steam version)
Windows 7 x64
Intel E8400
4GB RAM
Radeon 4890 1GB driver version 8.801.0.0

I hope someone can help me solve this nasty bug.