I solved the CUDA error on my machine by switching my render output to "slot 2". I have NO idea why that worked, but I've been churning out full 8K renders for an interactive VR environment using my GPU. Renders of these scenes before took about 1.5-2 hours. Now they take 15 minutes.

I'm running into this error and so far none of the above has worked, including disabling the windows hardware settings.