Question My pc gets black screen on startup while my GPU is plugged in

[Nijmaz]

When i start my pc with my gpu plugged in everything lights up gpu fans spinns for 2-3 second then stop spinning. My screen are completly black and not even booting in to bios. When i dissconect my gpu the pc starts normally I've had the same part for acouple of years and its worked then so its not any new parts who are making it not work. The GPU is a asus strix gtx 1080

 

[rgd1101]

full system spec? include brand and model of the psu

 

[Nijmaz]

full system spec? include brand and model of the psu

PSU: corsair cx750
CPU: intel i7 6700k
RAM: 16gb 1 stick
MOTHERBOARD: gigabyte ga-z170-gaming k3