Games typically go through OpenGL (or D3D), and don't touch the framebuffer. 2D games will be going through SDL or something else. All of these involve transfor

Games typically go through OpenGL (or D3D), and don't touch the framebuffer. 2D games will be going through SDL or something else. All of these involve transformations in internal memory far before writing out to the framebuffer. Edit: the other guy explained it better. > but the lowest he ever measured was 19ms so it seems like something is adding at least a frame of latency. Ignoring the fact that the measurements are completely bogus and nothing can be taken from them, the monitor itself will add lag, and the mouse/keyboard will add between 0 and 8ms lag per frame if it's a standard 125Hz polling rate configuration.