If checking the Enable Unsupported doesn't fix the problem then you are out of luck. NVIDIA changed the back end of their CUDA system and Adobe is no longer trying to keep up so Ray-traced rendering is no longer being developed. There are much better ways to accomplish the same thing with the integration of C4D. I've never used Ray-traced rendering for a client project, only for a few experiments. It's just to hard to work with.
I don't care about Ray-traced rendering either, but am I getting any processing via the Quadro card for normal rendering, etc? Seems the Preferences were more clear a couple years ago, and now I'm confused. Appreciate any light you or others can shed to help me better understand how to maximize settings on my system, and hopefully get some processing work done by the GPU.
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In its current state AE does not use the GPU for anything but accelerating the user interface. In a lot of systems things were better if you turn that acceleration off in the preferences.
There are some third-party plug-ins that rely on the GPU to accelerate their effects but the CUDA driver has absolutely no effect on these plug-ins. It has always been that way. NVIDIA has completely changed the direction they were going anyway so I wouldn't count on further development exclusively directed to CUDA acceleration.
Hopefully, in the very near future AE will make better use of the GPU, but for now don't worry about it.
Thanks for the response and detailed information.