Here is what I do. Start with Default Settings and with the madVR OSD up play your "toughest" video (eg on a 1080p display, say a 1080/60i Blu ray or 4K Blu ray). If it plays without dropping frames, try JINC, still OK, try NGU and start moving it up from Low, to Med, to High on Luma. Then repeat with Chroma. If you end up with a setting that you want but it "just" drops frames then play with the other settings to see if you can tweak it so it does not drop frames. Then ignore and enjoy the movie.