Auto adjust emulated FPS

[TkSilver]

That is not Dolphin per say on that game but what NFSU2 does naturally on the Gamecube. So if the game is made to run an unlocked framerate and then it adjusts more or less depending on the emulated X system CPU then that usually works fine. If a game is designed to run at X framerate and you slow down or speed up the framerate you will get time distortion effects, like audio issues or in some cases the game will break.