Having boot troubles

Tvedenzorz

Honorable
Dec 11, 2013
1
0
10,510
I have a old Seasonic Psu i used for installing the com before i got my 750 RM, but when i use the 750 it just makes a click then nothing happens. I can boot with the Seasonic 550 Psu, but not with the GPU plugged ind. The 750 cant boot altogether. Any ideas on problems?

Specs:
Asrock z77 extreme6
i5 3570k 3.4 Ghz Quad
8 Gb Corsair Vengeance
Radeon R9 280X Toxic
Corsair RM750 PSU