Quote Originally Posted by pcnazz View Post
Try uninstalling your gpu drivers & boot and install them again , for the hell of it give that a try .
Device manager, AMD Overdrive, GPU-z, do not recognize a second GPU installed in the computer. The GPU does work and is recognized if installed as the sole GPU, just not as a secondary one...even if it is only for physics.

Uninstalling and reinstalling GPU drivers would very likely not work, but I can give it a try when I get time.