It might be a Hardware issue?

[Biz]

I am new to Computer Hope because I am DESPERATE, and need some hope! 

I have a Cybertron PC, that operates on Windows 8. Usually, I am pretty experienced with computers and can fix whatever is wrong.

Here's the issue, while I am on the computer it will start up, and I can log on, but within maybe 5-10 minutes upon start-up it turns off without warning!!! 

At first I thought maybe it was a Power Supply issue, (I have owned the PC for about 2 years now) so I bought a new power supply for it, and just recently installed it.. It still shuts down completely, so I ruled that out.. Then I thought maybe it was a RAM issue, (which I had 8GB RAM so it was UNLIKELY) but I installed 16GB RAM just to be safe... It still kicked off..

I have done a hand full of Computer Diagnostics trying to target the problem with my PC.

I went through each and every driver through the device manager, including my processor to see if there were any issues whatsoever in there, and there was not a single problem found.

I uninstalled all of my recently installed software that might have been corrupt, and the problem has been persisting.

I ran a anti-virus scan in the event it was anything malicious, or if it was infected by corrupt software and there were no problems found there, which made me run a scan through Windows Defender, and still found no problems within the PC.

Conclusion being; 1. Not a Power issue.
2. Not a RAM issue.
3. Not a Driver issue.
4. Not a Software issue.
5. Not a Virus issue.

What are the chances that it is a Motherboard issue at this point? I figured if it were Motherboard related I would have found an error message regarding so within the Administrative Tools section? I'm stuck at this point.

[BC_Programmer]

What are your CPU temperatures like (and what CPU do you have)?

[Biz]

AMD FX(tm)-4130 Quad-Core-Processor 3.80 GHz
16GB RAM

[Biz]

I have CPU Thermometer on the PC now, and it says CPU Total is 11.6% but drops to 0.1% it's fluctuating. All of the CPU Cores (1,2,3,and 4) are all low 1% on average.

[BC_Programmer]

That is CPU Usage, not CPU Temperature. A tool like HWMonitor can display temperatures.

[Biz]

TMPIN0 34C
TMPIN1 109C
TMPIN2 101C

Sorry not sure how to read HWMonitor, Just installed it though, but thats all I could read before my PC powered off again.

[patio]

It's overheating...

[Biz]

What are the chances that it is overheating because I was almost certain that was not the issue? The fans inside the computer all run while the computer is on, and it doesn't feel hot to touch. How can I be certain that overheating is the culprit?

[patio]

Run another monitor app for temps...SIW for Windows and / or speedfan...

[BC_Programmer]

Those would be motherboard temperatures. It probably isn't detecting the sensor properly so isn't displaying the temperature correctly. You need to scroll down and see the CPU temperatures.

The temperatures could be accurate, they would likely be measuring areas  near Voltage regulators or the chipset. If a component is overheating, you are unlikely to feel it if it is a problem with the Thermal dissipation. For example an improperly installed, knocked loose, etc. Heatsink is not going to get hot when the CPU overheats, as the problem is that it is not making good enough contact to dissipate heat from the CPU to begin with.

[Computer_Commando]

TMPIN0 34C
TMPIN1 109C
TMPIN2 101C
...

AMD FX(tm)-4130 Quad-Core-Processor 3.80 GHz; TDP=125Watts

Be glad it's shutting down, it's on the verge of total destruction.
More comprehensive monitoring is here:  https://www.hwinfo.com/download.php

I suspect the cpu heatsink/fan mount has broken at least one of the mounts.