cernoramais it possible to have the GT430 and PPU running at the same time?
It is probably possible to get both cards working in the system (it will be a driver nightmare, however), but PhysX games won't be able to use both dedicated cards simultaneously. Only either one or another.
If you want to give it a try, here are some links:
How to enable PPU to work with recent PSShttp://physxinfo.com/forum/index.php/topic,120.0.html
And how to set AMD+NV Hybridshttp://physxinfo.com/wiki/Hybrid_PhysX