I recently changed the cable I connect my monitor with from a DVI to a Display Port cable. There was no particular reason for doing this other than that Display Port is a much more modern standard.

It was working fine for a while but now I have an issue that occasionally occurs when I boot the PC: the display resolution is set to 1080P and not the default 1440P that my monitor uses. Going into the Nvidia Control Panel, it shows 1080P as the highest resolution option that can be set. The only way I can fix this is to restart the PC and it will then boot correctly to the desktop with 1440P resolution.

Monitor is 2560x1440 Asus 27 inch and the GPU is Nvidia GTX980Ti. I tried disabling Fastboot on my MSI motherboard but that did not fix it. It seems that when the PC is booting up, either Windows or the hardware is not recognising the default monitor resolution.

Any ideas on why this is happening? I am running the 376.09 Nvidia driver.