Some titles require a resolution of 3840 x 2160 pixels.
Some titles require a resolution of 3840 x 2160 pixels.
I think I discovered a fix. By adjusting the windowed res in the shortcut target, I tried the program "Borderless window," which changes the program between window modes—similar to pressing Shift+Enter but more effective. It runs in fullscreen and shows the resolution as 1920x1080. The frames per second have returned to a stable 60, which is great. Thanks a lot!
It's impossible to do that if you aim for a borderless, windowed interface.