I have been having an issue with this and I would very much like it to be fixed.
Here is some information to reference.
https://bugs.kde.org/show_bug.cgi?id=353983
After launching a game fonts get blurry is basically the problem.
This has been an issue for at least 5 years. I use Nvidia because I need CUDA in my development. This bug makes it extremely difficult to use. Please consider fixing this.
I am willing to pay an nvidia developer if that is what it takes.
Thank you.