I am trying to connect 4 monitors to my 6870 flex. It is meant to support 5 so this shouldn't be a problem but I can't get the 4th one to connect. I have been using 3 monitors for a while (2 dvi and 1 hdmi) but I recently bought an active display port to dvi adapter. The monitor is detected in windows but when I click extend desktop and then apply it says 'unable to save display settings'. What could be the problem? 2 dvi 1 hdmi to dvi 1 displayport to dvi The adapter seems to work ok as I tested it using 2 dvi and 1 displayport.