PC keeps powering off and on after around 2 hours

[dualloop]

Hi,

I have a really odd issue that I cannot seem to resolve.
My PC will power itself off and then back on again after around 2 hours, from what I can see in event log.
Event log only lists Kernel-Power and no other errors or critical events at the point of it powering off.
It’s becoming difficult to troubleshoot as you need to leave the PC for around 2 hours to see if the issue is resolved.
The strange thing is that it will happen when the PC is left idle with nothing running, it does also happen when gaming.
I have swapped out the PSU, thinking it was a power issue, but this didn’t change anything.
I have run Memtest86 at 6700MHz with no errors. It did produce errors when run at 7000MHz.
I have also re-installed Windows 11 Pro 24H2 to rule out a software issue.
Intel default setting in the BIOS is set to performance and I have also lowered the RAM speed to 5600MHz.

I have seen online the issues with 13th gen i7 CPUs but can’t see any way that I can test if it is the cause.
Can anyone suggest a program that I could run for this?
I’ve also seen some posts online where users have seen the new Windows 11 24H2 update causing reboots.
Has anyone here experienced this?

 

[arjgrundy]

I had similar issues caused by the windows 11 update 24H2. What fixed mine was a firmware update from western digital for my m.2 drive. Not too sure if that's something you could look at?

 

[dualloop]

I had similar issues caused by the windows 11 update 24H2. What fixed mine was a firmware update from western digital for my m.2 drive. Not too sure if that's something you could look at?

I've downgraded to 23H2 and have been getting the same issue.
All firmware and BIOS is up to date too and I don't have a WD Drive.

 

[5abr3]

When you say power off I assume you mean it just goes dead like you held the power button or had a power cut rather than goes through Windows a shutdown/restart cycle?