Windows 7 64-bit
Intel Core i7 720QM
8192MB DDR3
ATI HD 5870
I go from 150 fps on the main menu to 3 fps at the server browser. On maximum settings at 1920x1080, I have about 60 fps indoors and then drop to about 20 fps outdoors.
On minimum settings at 800x600, I have about 60 fps indoors and then drop to about 20 fps outdoors.
I have the 11.5a hotfix installed, has not helped at all.
What really confuses me is how no matter what I switch my settings to, I always get the same fps.
There are plenty of threads on the Steam forums for this game about the same issue as well.