Pc turns on but no signal and no usb power

[navidmoezinia]

Recently my pc shut down by itself and started to restarted itself. I unplugged it and after a while i noted that the fans work but usb ports dont work and monitor gets no signal. I bought a new motherboard but the issue still happens. What can i do?

 

[turkey3_scratch]

Full specs?

 

[navidmoezinia]

I7 3820
Gtx 670
EVGA 650 watt PSU
Intel DX79TO motherboard
1 hdd and 1 ssd

 

[navidmoezinia]

Bump