Hello all,
As others might know Mathematica used to support OpenCL on Nvidia and AMD hardware. Of course since they never updated the OpenCLLink AMD hardware is essentially unusable (unless it is 10 years old == using an "ati" opencl driver), unless you care to rewrite the OpenCLLinkl sources (which should not be necessary for a commercial product).
Anyway, I stumbled on a way to get Nvidia and AMD working. If you install both platforms (hardware + drivers) such that the Nvidia libOpenCL.so is found first, both systems can be used.
Thought this might be of interest to some.
Have fun,
Carsten