Maybe I will get to creating a forum post going into detail of this matter, for all it's worth I kindly suggest to use external monitoring software such as RivaTuner Statistics Server (RTSS) or Intel PresentMon in order to observe the changes in frame rate and most importantly how the frame time graph looks like. I had also noticed the speed-up function increasing overall performance, albeit with some diminishing returns the higher the value, hence why the standard (I believe) 3.0x multiplier realistically speaking ends up being about 2.5x instead, also resulting in a more bearable presentation given the static not smooth camera. Perhaps part of that also comes from the fact so many games are using a measly 256x192 native resolution, making any bit of movement even more apparent to the eyes.