I use Sony Vegas for gaming-content, and when I record with Shadowplay I have my nvidia graphic settings set to quality, not performance. However, as I edit I switch to performance again, and this is also the setting when I render. Does rendering in performance, not in quality, negatively affect quality at all? I'm guessing no, but I want to make sure. Should I have Nvidia graphic settings prioritize quality both in recording and rendering, or is it enough when recording for optimal quality?
For your qestion I don't have an answer, but there may be a way to get it.
Do a render, just a short portion of a project, so the difference is only the nvidia settings. Everything else -tenplates, etc.- be the sane.
Then in a new project add both rendered file to the timeline to 2 tracks.
Have them in perfect sync.
Then change the above tracks compositing mode to subtract.
Set preview to best, and preview the project.
After that change the order of the tracks, but again, the above track set to sub.
If you get pure black preview both times, the 2 events are just the same, so nvidia settings don't affect render output. Otherwise you will see the difference of the pictures I guess you'll see something around the edges in the picture if not pure black...