A new version of the PhysX patch that allows a Radeon card (for 3D rendering) to be used with a GeForce card (for PhysX) is available.

If you read the release note there is a pretty shocking thing:

- added support for fixing a timebomb, introduced in 196.75 and 197.xx drivers (gravity reverse + overall slowdown after a few seconds of PhysX processing)

What ? NVIDIA has introduced a timebomb in their ForceWare / PhysX drivers to prevent the use of GeForce with a Radeon ?
http://www.geeks3d.com/20100422/hybr...-timebomb-fix/