Try this :-
Start Fraps (Or any other FPS Recorder)
Play game like Skyrim (Anything else will also work)
Keep the settings on lowest possible (Record your fps)
Keep the settings on Medium (Record your fps)
Keep the settings on Ultra\High (Record your fps)
Then share here.
"Record" means that remember what fps you got in those settings
Try this thing atleast in 2-3 games.
If possible then try it on these games: Skyrim, CS:GO & BFBC2