I have also a MSI GTX 980 Gaming (SLI) and did not have any issues with resolution changing. Mine has always been 4096x2160 @ 60hz since the day I got it and has never changed.
I am using windows 8.1, what O/S are you on? Also, is your displayport 1.2 enabled in the OSD? Another thing maybe the cable? What dp cable are using.
And have you tried using the nvidia control panel to setup custom resolutions?
I am using windows 8.1, what O/S are you on? Also, is your displayport 1.2 enabled in the OSD? Another thing maybe the cable? What dp cable are using.
And have you tried using the nvidia control panel to setup custom resolutions?