After getting out of x16 and the concrete factory having disabled the brain emitter and entering the back countryside, I'm getting like 2 FPS if I look at the general direction of the level exit. Is it only me? I have to keep looking at the sky or to the ground to have a decent framerate.
You have to know that DX10 mode is still bugged. I suggest you to switch to dx9 mode if you encounter any problems but please submit bug when you check is it game engine fault or just DX10 mode.