I have a problem with it. I get GTX 670 in my jar and in some strange places (angle of room with cupboard full of books, some stairways) fps going down to 35-40
I was try d3d9.dll and bUseThreadedAI with iNumHWThreads in *.ini file, it didn't help...
Curiously fps get 35 with low graphics too.
win7 x64, 8Gb, Athlon II X4 651