I have 1 DVI, 1 HDMI and 2 Mini DisplayPorts in my graphics card. I have a TV hooked up to the HDMI port, and two displays connected to the Mini DisplayPorts (with HDMI-mDP cables, because i have no mDP input on my displays). The setup works fine except for some reason one of the mDP ports yields a smaller picture compared to it's sibling.

enter image description here

As you can see on the screen to the left, there's a big black border to the picture (it's the same on all sides). The one next to it displays correctly.

Only one port yields the small picture. I have tried only connecting one display to the "faulty" port (tried both displays), it does not matter. I also tried switching cables.

I'm using an ATI Radeon HD 6950 graphics card. I can't find anything related to this in the Catalyst Control Center, and i can't seem to find anyone else having the same problem.

Is my graphics card defect? Is this a mDP limit of some sort?

Edit: All displays are running on 1920x1080, in case that matters.

Edit: Ended up using a DVI port for my second monitor instead. Assume the mDP port is broken.


The problem wasn't with the port, it was a setting in AMD Catalyst Control Center. The setting is in here:

My Digital Flat-Panels > Scaling options

Select the faulty display in the dropdown and drag the scaling slider to 0% overscan. Voila.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.