I have a 17" 1280x1024 5:4 monitor and I am trying to enforce 4:3, but the image is filling up my screen, when it should be giving black borders so it doesn't stretch. Yes, I tried turning off "Stretch with GDI." and that didn't work.
To be honest I have never even saw 5:4 ratio in real life I'm just curious what will be the result. Yeah in NVIDIA Control panel make sure GPU scaling is enabled as well as maintain aspect ratio option. Now with 1024x768 being 4:3 you should see black bars in Fullscreen but I'm not sure.
Tried setting the resolution to 1280x960 (A 4:3 resolution.), and while I got black bars on the top and bottom, I'm still not getting them on the sides. The Stretch with GDI option does nothing while on and off.
EDIT: Yeah, it seems the best solution right now is to just use 1280x960. If anyone who knows Japanese could ask Dr. Hell to add a scaling option for 5:4 monitors so we can maintain the proper aspect ratio, that would be swell.