I just upgraded from a geforce 970 Ti to a 1080 and installed the correct drivers from nvidia's site. I'm still getting the same FPS ingame?

Check to see if your specific games are a) cpu intensive or b) limited by response time from server. Probably this'll mean reading a lot of online reviews [well, life is tough but someone has to do it, eh?]

next idea… Delete the NVidia software entirely, reboot computer, and then reinstall it from disk. Just in case the issue is that the universal NVidia driver hasn't noticed the change in gpu for some reason

Did you use DDU to remove the old drivers before installing the new ones?

What is the frame rate. If your getting a fixed 60fps or another even number like 30, it means the game, drivers or maybe monitor are locking it in at that rate. Other then that try reinstalling the drivers, checking graphics settings in the game. It may have upgraded them at the same frame rate.

What FPS are you getting? 60 is the normal rate and you can't go higher without a nicer, faster monitor. Also check the graphics card settings, make sure max fps isn't like 30. Also in game.