hello i am have the same problem but one step more i have an activemin display adatore two of them and still have only two out of three monitors i can run two mini display /1xmini,dvi/1xmini,hdmi/1xdvi,hdmi/but 3 nope 2x mon max 1xmini 1x hdmi/1xmini 1x dvi/ 1xdvi 1xhdmi ok but when u do this 1xmini,1xdvi,1xhdmi u only get two out of three some time pc sees third simetime not when i start playing around a bit lol trying to get it (third monitor ) running. what can i do?? help i have a pc shop looking in to this to and there (schratching there heads) blank.???