I wont differ because your code just changes the velocity of the gameobject. If velocity changes, speed changes but since transform.right * velocity * 3f is always same, velocity doesnt change, so speed doesnt change.

You can try this yourself by going to game window, selecting resolution option then turning Vsync on or off. Enabling Vsync will lock your fps to 60, disabling it will increase your fps.

You can see your fps from going to game window and clicking stats option