When i try to change my resolution its greyed out and locked on 1280x720, first i thought it was since it was in windowed mode but ingame it says its in fullscreen, i cant seem to get it into real fullscreen mode and 1080p plz help all i see is pixels
I just tried reconnecting the other display and after some tinkering it seems to be working now. The problem, it seems, was that my secondary display was connected but not "active". It was an hdmi output to an avr connected to a television. The avr was on but the tv was not. And the avr/tv was disabled in the Nvidia control panel. When I reconnected the hdmi cable, the game allowed me to change resolution but not the display (tv was not on) but the max resolution (1080p) was that of my avr/tv not the monitor i was using. After I turned everything on all options became available.
It seems the game was picking up the secondary display despite it being disabled in Nvidia control panel.
I did lose some fps running both displays so the easiest fix for me is to just run with the one display connected although that my not be viable for other people.
EDIT: I should also note that I had disabled GeForce Experience throughout this process, though I don't think it played any part.
Update: I restored my hardware to its previous state (tv disabled in control panel) to see if it would happen again and everything is still working now so I think it was just my setup at initial launch that confused things.