I think I have an answer, but thank you for answering anyway.

Hello! I think this problem is very old, I have seen older threads, but I did not get an answer from there. When I start the game, I put all of my own settings in (2560x1440) and start the game in fullscreen. I have the newest nVidia drivers (I am using a GTX 1070) and every game runs fine on my com...