I really love to hear that some more Players can use my solution also for themselves!

And I really like to repeat that, because it helped a lot in my Case:
Try to reduce the Refreshrate for your Monitor. You can do this in your NVIDIA-Control Panel under the Tab "Change Resolution".

I put it down from 60 HZ to 50 HZ. My FPS are now automatically locked at 50 with V-sync ON in NVIDIA-Control Panel. I don't know what this Effect exactly does, but it really helped for smooth Gameplay! Of course this might be only helpful for Guys without an G-Sync Monitor!

What might be also important, is to set AA to "Application-Controlled" and AA-Transparency to OFF. So try to use the Ingame-AA-Settings!

I am also using PROCESS-LASSO for my Games, this Program will also help you. With this Program (Freeware) you can assign your Games to different Cores. In my Case I placed the CFS3.exe on Core 2 to 7, and Windows and my other Background-Programs are running on Core 0 and 1.

Will be back here next Weekend...