Question Random shutdowns and restart loops once or twice every week. Is it my PSU or my mobo?

[awpertunist]

So, I have been having these problems for a few weeks now
My PC usually works fine for weeks even for longer durations and then randomly once or twice every week, it shuts down within 5-10 minutes of using and then after I try to press the power button, nothing happens. I, then turn off the switch on the wall socket and turn it on again or I try then screwdriver method on the motherboard to jump start, and both the methods work to turn the PC on. And then it restarts after every 2-5 minutes for 3 or 4 times before working normally again for a few days.
Sometimes it shuts down multiple times before it starts restarting 3 or 4 times and I just can't seem to find what's causing it
It has nothing to do with the load or the temperature because the shutdown-restart loop is very random and usually occurs within the first few minutes of starting the computer on some days and after the loop ends, the system runs for 10-12 hours everyday with continuous usage

Things I have tried so far :

• Updating the drivers
• Fresh windows installation
• Testing the RAM sticks (one at a time) with MemTest5
• Cleaning the PSU (It had a lot of dust bunnies)
• CPU Test on prime95
• OCCT Power test for 5 minutes

This is the error I get after every shutdown and restart

-

System

- Provider [ Name] Microsoft-Windows-Kernel-Power [ Guid] {331c3b3a-2005-44c2-ac5e-77220c37d6b4}

EventID 41

Version 9

Level 1

Task 63

Opcode 0

Keywords 0x8000400000000002

- TimeCreated [ SystemTime] 2023-11-08T11:17:12.5622378Z

EventRecordID 7621

Correlation

- Execution [ ProcessID] 4 [ ThreadID] 8

Channel System

Computer Awpertunist-PC

- Security [ UserID] S-1-5-18

-

EventData

BugcheckCode

0

BugcheckParameter1

0x0

BugcheckParameter2

0x0

BugcheckParameter3

0x0

BugcheckParameter4

0x0

SleepInProgress

0

PowerButtonTimestamp

0

BootAppStatus

0

Checkpoint

16

ConnectedStandbyInProgress

false

SystemSleepTransitionsToOn

3

CsEntryScenarioInstanceId

10

BugcheckInfoFromEFI

false

CheckpointStatus

0

CsEntryScenarioInstanceIdV2

10

LongPowerButtonPressDetected

false

LidReliability

false

InputSuppressionState

0

PowerButtonSuppressionState

0

LidState

3

My Computer specs :​

Intel i5-8600K
Aorus Z370 Ultra gaming 2.0
Corsair CX650 PSU
Corsair Vengeance 2 x 16 GB DDR4
Nvidia 1060 6 GB

How do I confirm if it's the PSU or the mobo that's causing this?
It is time sensitive and I want to get the faulty part replaced asap because of work

 

[--SID--]

Is the motherboard BIOS fully up to date?

 

[awpertunist]

Is the motherboard BIOS fully up to date?

Yes it is

 

[AntonyLovric]

Sounds like an issue with power (PSU, power plan/config, resume from sleep, etc.,). Are there any errors in the application or system logs before the reboot?

 

[awpertunist]

Sounds like an issue with power (PSU, power plan/config, resume from sleep, etc.,). Are there any errors in the application or system logs before the reboot?

It is a hardware problem for sure. The OS is fresh and there are no errors in the logs other than your generic error that you get on every unexpected shutdown

 

[AntonyLovric]

Do you have another PSU to test with? Wondering if somehow the PSU protection is tripping. It would be great if PSUs had a little display (LED / seven segment) on them to indicate why they were shut-down.

Chatted with Corsair online (they have a chat support feature). He said reach out to them, there are no active recalls on the CX-650 but he said;

Have you friend please reach out to us so we can assist them with their Power Supply

...worth a shot

 

[awpertunist]

Do you have another PSU to test with? Wondering if somehow the PSU protection is tripping. It would be great if PSUs had a little display (LED / seven segment) on them to indicate why they were shut-down.

Actually, I do have another PSU that I can borrow from my brother's PC but I don't know for how long should I test it to be sure? The shutdown-restart is very random and unpredictable. It hasn't happened again since I posted (touch wood)
The one I use is a Corsair CX650 and the other one is a Gigabyte 550W (I don't know the model)