I have following issue:
I had HD5870 Eyefinity card - 2GB memory and 6 mini displayports. I used to have connected 2 displays - through mDP-2-DVI converter cable.
I recently acquired third display and - again - connected it through mDP-2-DVI converter cable. However while I can detect all three displays, I can't make them all work at the same time. Do I need something like DisplayPort 1.2 MST-capable hub or is there a way to make it work with the cables I have?