Hi! I have Nvidia GTX770 2GB and trying to power it up with Fatal1ty 780w 80+bronze and it's not working. I tried to power it up with my friends pc, it worked. Also he tested my PSU with his GPU and still worked. Thing is, this GPU with this PSU is not working, i tried looking it up on pcpartpicker and it's compatible. Any suggestion why they are not working together? Thanks in advance