Fault PSU or Fault Mobo?

Jamie96

Honorable
Nov 22, 2013
5
0
10,510
So I've had my computer for a while and decided to upgrade my graphics card from the Raedon Sapphire 5770 to the GTX 760 wind force, with this upgrade I needed to upgrade a power supply along side.

I plug the new GPU and PSU in (I made sure) and try to boot up, It starts up for a second (LED & Fans turn on) and then the computer turns off for about 4 seconds and once again it starts up for a second on its own.
When I tried my old GPU with the new PSU it started up for a second, turned off for about 3 seconds and then it booted up but it was extremely slow booting up.

I have tried installing the new GPU & PSU on my father's computer I plugged them both in and it worked like a charm, which makes me wonder if its my motherboard that is the problem. However, it is running absolutely fine, I'm using it right now. Im not sure whether there's compatibility issues or something is outdated.

I have been looking everywhere for solutions and work around but there seems to be nothing.


Specs:
CPU - Intel i5-650 (Stock cooler)
Mobo - Foxconn 1156 socket
GPU - Raedon 5770 (Upgrading to - GTX 760 )
PSU - Stock 450w (Upgrading to - M85h 650w )
RAM - 8gb

OS - Windows 7 Ultimate