Computer won’t boot

May 11, 2018
22
0
10
Gigabyte gaz270p
GeForce gtx 1070
EVGA 650w
I7-7700
My pc works fine if I don’t have the gpu installed via onboard graphics, but when I plug in my gpu my computer boots with everything working then about 3 seconds later shuts down and reboots without the MB lights on and then there’s no display/no signal from my gpu or onboard graphics. The gpu is brand new. Any suggestions
 
May 11, 2018
22
0
10
I’ve also reseated it multiple times to ensure it’s connected correctly. I’ve also tried disable the onboard graphics on my device manager as well as in my bios