I was able to use 1440p before and now I get no signal. It's a 4K TV (LG 49 UH770V) and a GTX 780 GPU. 1440p used to work fine, but try and run games fullscreen in that resolution it no longer works
EDIT: I think I know what it was. Games are trying to output at 1440p60 when the TV will only take 30 fps at that resolution
EDIT: I think I know what it was. Games are trying to output at 1440p60 when the TV will only take 30 fps at that resolution