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I have set up 3 monitors (Full HD) as a group in eyfinity mode catalyst control center as you can see here:

This is the card i have:

The 3 screen are connected via 2 DVI ports and one display port to dvi active connector

All three screen are in the same resolution and model

The thing is that when they show the desktop all looks fine but when playing Full HD video (Mp4)

I get black borders on the upper and bottom no matter what player i use (media player, VLC, etc,,,)

I would love to know if there is any solution for that problem