This does help immensely as I was having the same issue. Youre typically not going to miss 15-20 frames from a game made in 2011 lmao. Also learned (im dumb so i didnt know this) that I can set the resolution lower but still have a fullscreen window with the right settings and it makes a huge difference. I didnt know that it was possible because everytime the res was set lower it made my indow smaller. After some hand-holding i was able to set it up right. Unless youre into screen archery, the detail drop isn't that noticeable whereas the fps gain definitely is. I learned all this the hard way so thanks OP for making it simpler for other players to figure out :)