GTX 770 working on Dell Optiplex 790 MT but 980 won't boot the pc

So, I am trying to install a 980 onto this pc, but the pc won't boot for a reason. My old 770 works fine, but 980 wont.

Submitted May 16, 2018 at 09:57PM by Tengokuq https://ift.tt/2rKzQWS