Pc Help Asap

my wifes pc keeps turning its self over ( can mostly be when shes on diablo 3)

ive downloaded core temp speccy n speed fan. there temps are normal around

cpu 53c
mobo 51c
graphics card 44c

thats doing nothing on the pc. when diablo 3 is up they can rise to around 80c-105c

few weeks ago i had to change the processor fan n ive just put new thermal paste on it
and 2 mre fans. but its still turning off.

did think with the new fans that it may need a bigger wattage psu but is 650 watt atm


[background=rgb(250, 250, 250)]can upload picture of core temp n speed fan if need be[/background]

 

Hi Gavin.Welcome to Computer Help Forums.
Those temps are far too hot and that decreases the the life span of your Hardware components.
You may have added fans however if you are not getting proper circulation they don't benefit much.
Make sure the tower has proper circulation and the hot air can get out easily.
Make sure your Wiring Harness is not impeding air flow.
Take the side cover off and set a household fan directly onto the Mobo/processor and see what difference
the temps are under the same load.