Hey. ATM i'm trying to connect a second monitor to my pc, but only 1 out of the 4(in total) dvi ports actually produce a picture. I've tried with both screens on all of the ports, and only 1 port gives output. I've tried to see if the ports were disconnected, tried to see if the monitors were disconnected, re-installed my nVidia drivers, and i've come up short. Can anyone help me fix this?