I have a GTX 970 that has a HDMI Port and a DVI port. The monitor I have plugged into the DVI port works perfectly fine and now I've wanted a second monitor and the second one will not work. It is plugged in through a HDMI To VGA lead as my monitor only takes a VGA and the graphics card has a HDMI spot. The monitor says 'cable not connected when I try and plug it in. Any help?