"Running the game at 60fps like you are trying to say will mean that it is effectively running at 200% speed. Audio will be double speed and sound harsh. Movement will be double speed. etc etc.
Instead of messing around with your CPU could I suggest playing around with different vsync implementations, or just stick to the default framerate." - Selby 2018
Selby is in this video: https://www.youtube.com/watch?v=fW0qccbF_NE