Do you have Nvidia Overlay enabled in Nivida Geforce experience?
Yes, I use shadowplay for the recordings, never had a problem with it when using the 980
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Do you have Nvidia Overlay enabled in Nivida Geforce experience?
Yes, I use GeForce experience for the drivers.
I have little experience with experience (lol) but is it possible it is adjusting quality settings without you knowing?
Your graphics card drivers are in a separate folder away from your game folders.
You can also try swapping over Direct X for the game from 12 to 11 and on Nvidia control panel hit restore and apply to see if that helps too, sometimes a setting in there can bomb fps in games. such as Max Framerate