Loss of input

[imperiects]

My pc started losing video input yesterday. The pc would boot and show bios/manufacturer screen then lose signal when windows loads. It boots fine in safe mode and normal mode with gpu disabled. I tried rolling back gpu drivers to three previous versions. It did not work. I tried all display ports. Same issue. Tried a different cable. Didn't work. I installed an older model gpu and it worked fine for a few hours then I started losing inout signal again. I am not getting bsod and the only events logged are the pc shutting down. The 980ti does not show windows at all. The 770 will load windows and work for a whike before it kicks off. Gaming expedites the issue. What could be causing this?

Windows 10 64bit
i5-6600k @3.5Ghz
Gigabyte Ultra- durable z170
980 ti hybrid
GTX 770 (temp replacement)
24gb DDR4

 

[rgd1101]

psu make and model?

 

[imperiects]

cooler master 750 80 plus bronze
rs-750-acaa-d3