The new version of NVIDIA drivers 340.52 blocked PhysX technology , where, along with the NVIDIA solution used another manufacturer. As NVIDIA explains, this is due to the fact that in heterogeneous graphics configurations can not be guaranteed high quality of PhysX.
NVIDIA's solution will affect primarily those who use NVIDIA graphics card to accelerate physics calculations, and as the primary adapter - model based on the graphic solutions AMD. May also be affected and the owners of hybrid systems based on the AMD discrete graphics with NVIDIA.
In addition, NVIDIA has changed the minimum requirements for their adapters. PhysX support is now provided only for GeForce 8 Series or higher, having 256 MB of onboard memory.