Upgraded my rig from a z97+4790k to 5900x+x570. Kept my 1080ti.
Brand new install of windows.
I can not get windows or nvidia panel to detect my 3 1440p panels as 1440p. All three show as 1080p. Custom resolution just scales it and monitors still report 1080p.
Running linux live usb gets the same thing.
I have reinstalled windows, updated all drivers and got nowhere.
Tried one monitor at a time, different cables, got nada.
Putting the GPU back in the old setup, monitors work at 1440p instantly.