I think our friend Sivart2000 is right...! With the DirectXY 12, we give even more work to the GPU. And if we ask the CPU to work as before (unlimited FPS), something seems to me incorrect. You should give the CPU a little more time instead of asking it to send a lot of images to the graphics card...
I tested : unlimited FPS, the fluidity is very bad... FPS limited to 30 or 40 depending on the PC configuration, limited either on the graphics card or in P3Dv5, and the fluidity comes back!
Try it, it's worth it....!
