In response to my frustrations with Lossless Scaling, my friend Glenn kindly shared his experience and settings in the comment section of my post #903, encouraging me to give his setup a try since it is working pretty well for him.
Frankly, I really wanted Lossless Scaling to work on my system, too. So I followed Glenn’s instructions (edited slightly for readability) below:
Glenn: In nvcp (NVIDIA Control Panel):- Disable gsync; Set vsync to let application decide; and Set low latency to off.
T: I don’t see the gsync function, probably my GTX3080Ti card doesn’t support it. Have reset low latency from Ultra to OFF.

