1080p @ 144 hz on 1440p monitor and AMD card - can't get full screen scaling???

[ToastyX]

I remember AMD's driver having issues with GPU scaling at certain resolutions, especially at higher resolutions/refresh rates with older cards like the R9 280X. Newer cards like the RX 580/570 seem to have less issues scaling with the latest drivers, so it might be a hardware limitation of older cards.

I don't know why the monitor would have a "Wide Mode" scaling option because G-SYNC monitors usually can't handle non-native resolutions without GPU scaling. If the monitor can actually scale 1080p @ 144 Hz itself, you'll have to add it with CRU to use the monitor's scaling options.