Thanks RickyAstle98/flowreen91 for your recommendations. Its none of that, the app capture fine the frames , enable Draw FPS its the first I do at the start of testing and its ok.
Close overlays like Steam, Discord, NVIDIA, I never test something with overlays open!
I don't use Mpv, don't liked
The source problem, as I mentioned its hardware related, I think the tv accept better via Gsync compatible and VRR the 72fps or 96 fps of rife x3 and x4, the settings of the picture giving by RickyAstle98 give similar result but still I prefer Rife x3 /x4
I'm using windows 11 24h2 , mpcvr testing version, not the vapoursynth of svp, many variables to tweak and try
But again thanks both, I really enjoy testing others option to improve my viewing experience, and some many time through time rewatching movies or clip I remember how we started and how far we've come today.
Many time thanks to this thread