At what looks to be a decade old, the old electrolytic caps are a shadow of their former selves. This could be a motherboard issue or another old part. Try thermal paste on all other heat sinks. Be sure the case cover is off and a fan pointed at the open case to see if anything changes.
Age is not your friend on this one.
Try adding a Web Speccy since you didn't tell what you had. Read https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web
I have a very big annoying problem, when I try to play high end games my computer just restarts , I tried applying thermal paste, it does help lowering my temperature but not fixing my problem, do you have some solutions to fix this problem? I already changed the thermal paste and temperature is good.
PC specs: CPU: Intel core 2 quad CPU Q6600 2.40 GHz 2.40 Ghz Memory: 4 GB DDR2 GPU:AMD Radeon R7 200 Series PSU: TT TR2 450W Bronze
Here is my brothers PC spec but his PC works just fine. GPU:AMD Radeon R7 200 Series CPU: AMD Athlon Phenom PSU: 300W