[SOLVED] PC restart loop after long session

[Anphonic]

This PC is a living nightmare.

Specs:

Asrock b360m motherboard
I5 9400f cpu
8gb ram ddr4
240gb ssd
Msi gtx 970
Thermaltake 600W lite

1- PC is restarting after 7 - 8 hours of use (even if idle) the led on the fan starts flickering then it keeps restarting. The next day i can turn it on for another 7 - 8 hours.

2- I switched the motherboard, cpu and ram for new ones by warranty. Still same problem.

3- i switched to a 500W bronze PSU to check if problem was with power supply. Still same.

4- Store suggests it is a problem with GPU. But when plugged to another system, it works fine.

5- The Problem maybe related to windows update since i formated, the pc usually stays for more than 12 hours and problems might be happening after update... gpu driver faultiness maybe ?

6- Bios is updated based on what the store said to accomodate 9th gen cpu.

It's been 3 months i am having problems with this pc.
Theory is the gpu might be overheating (even though msi afterburner not showing high temps due to faulty readings or driver is the problem or faulty gpu.

Any suggestions or steps are appreciated.
Thanks.

 

[Darkbreeze]

No, that was not the only difference. There were MANY differences.

For one, you were using entirely different electrical outlets than at your house.

For another, if you have any power strips or UPS battery backup, those were not being used either.

And, there's a good chance that unless the shop you took it to was on the same street or neighborhood you live on, that they are on an entirely different section of the power grid and potentially might be in an area with better power because it is for business rather than residents.

What is your actual motherboard model, because ASRock B360m is not a valid model, that only tells us that it is a micro ATX motherboard with the B360 chipset from ASRock, it does not tell us what MODEL it is.

Are you using the stock CPU cooler or an aftermarket one, because I'd be a lot more inclined to believe that a tower cooler hanging horizontally from the vertical motherboard might be stressing out the CPU socket and causing pins to lose contact, than for the graphics card to be doing something similar, on any modern motherboard, unless you do not have the graphics card secured to the back I/O panel correctly.

However, being honest, I still believe that instant shut downs or restarts are usually power supply related, especially if there are no dumps to be had indicating hardware or software errors, and since the ONLY power supplies that have been discussed in this thread are models that are extremely poor quality, having been down this road literally five hundred or more times before, I find it very hard to entertain the idea or put forth the effort to try and track down any probability of there being something other than the power supply causing these problems.

Obviously there are always other things that could be to blame, in every case, but without having a KNOWN GOOD power supply of substantially better quality than anything you've tried so far, to eliminate that as the problem especially when it is 100% fitting the exact symptoms we see anytime a poor or faulty PSU is being used, then anything else is just resorting to guesses or throwing crap at the wall to see what sticks.