I have an AMD 7950. It currently outputs a 1080p video source, even when I set the Desktop Resolution to 1680x1050. I'm trying to make it output 1050p, because it is the only resolution that looks good on my screen. By that I mean 1080p makes the color becomes distorted on my screen in a way color correction will not fix. If I make a game run fullscreen at 1050p then the card will finally output 1050p. I don't know what I would need to do in order to have my desktop also output a 1050p resolution.
Some hareware specs:
AMD 8350 at 4.0GHz
16GB ram at 1600MHz
XFX AMD 7950 3GBvram
All running on Windows 10. (This problem was present from time to time on Windows 7)