I have a 5600xt and I just bought three TVs. I'm having issues with the 3rd tv. All three TVs are the same model. The setup is 1 HDMI and 2 Displayports. 2 of the screens work fine and show recommended res of 3840x2160. The third refuses to go to that resolution and the highest it will go is 1920x1080. I've tried swapping cables etc...and no luck. I need them all at the same resolution. Any ideas? Thanks!