So, my old 670 burnt out in a weird way where it would do basic video but only if nvidia drivers werent installed, if they were installed then the system with that card was a brick. Was using a 550 while waiting on shipping, works fine but obviously can't have good settings with it. My new Gigabyte gtx 960 windforce 4GB just arrived, I let it get up to room temperature since it had been outside in the cold for a little bit, then plugged it in. Through HDMI and both DVI ports the only output is a blank screen with a " _ " at the top and nothing else. Looks like a prompt but does nothing. It does not even boot the bios that I can tell. Even if the old 670 had a problem it at least did basic video and showed the bios.
Windows 10 64 Bit
Intel i7 3770 @ 3.4 GHz
Gigabyte g1.sniper m3 BIOS F10f
Gigabyte gtx 960 Windforce 4GB
HP Pavilion 27xi 27"