I have a 770 CLASSIFIED as my main GPU (using HDMI), with a 750 SC that I had in my pc case as a phyx box/backup. I have been trying to get a second monitor hooked up to the 750 (also via HDMI), but it won't output a signal for my 2nd monitor to recognize. If i plug the 2nd monitor into where the main monitor usually is, it works fine so it is not the cable or monitor. Nvidia control panel won't recognise the 2nd display, and I have tried numerous troubleshooting steps with microsoft. Any tips on this wierdness?