I just recently got a new 4k monitor to use in an extended, dual-display setup. For some reason though, it works fine until I plug my 1080p display in as well. The second I plug in the 1080p monitor, the 4k monitor goes fuzzy and says that the max resolution is 1440p. Then, I unplug the 1080p monitor, and the 4k monitor goes back to being its native 3840X2160.
I don't know what the deal here is. If anyone can help, I'd really appreciate it. I've spent all day trying to figure this out, and I can't find any solution.
If it matters, My 1080p display is plugged into a gtx 980 via HDMI, and the 4K is plugged into the same card via DisplayPort. Both are 60hz monitors.
UPDATE: I have tried setting a custom resoltion of 3840X2160 to override the automatic 1440p. This only makes it say that it is running in 4k, but it's pretty obviously still 1440p at most.
I don't know what the deal here is. If anyone can help, I'd really appreciate it. I've spent all day trying to figure this out, and I can't find any solution.
If it matters, My 1080p display is plugged into a gtx 980 via HDMI, and the 4K is plugged into the same card via DisplayPort. Both are 60hz monitors.
UPDATE: I have tried setting a custom resoltion of 3840X2160 to override the automatic 1440p. This only makes it say that it is running in 4k, but it's pretty obviously still 1440p at most.