How come if I am running a game at 300 to 400fps, and then cap my fps at 120 to keep it steady, my fps will now dip between 118 to 120? Shouldnt it never dip below 120 since it didnt before I capped it?

Question

How come if I am running a game at 300 to 400fps, and then cap my fps at 120 to keep it steady, my fps will now dip between 118 to 120? Shouldnt it never dip below 120 since it didnt before I capped it?

In: Technology

Answer 1

The computer takes the cap as a limit beyond which it won’t work. Previously if it finished one frame it would start on the next right away, but now it waits until the next frame is needed to reach 120 fps. Sometimes one frame might take a bit longer and it would fall behind.