I encountered the same problem as the posters in the above link ran into playing Mirrors Edge on my system... anyone else here play Mirrors Edge and encounter this?
The game literally goes from perfect playability to 4 - 8 frames per second.
Going to try their advise now and turn off PhysX, and google a but more later.
Any other ideas on this? My previous Pentium 4 system got through that scene without a glitch.. strange.. but then I did have nVidia GTS250 in that... apparently something about onboard PhysX capabilities on that card?
Edit:
Yeah, did some more quick reading... pretty much just the PhysX. hmm. lol