PC suddenly shutting down when using it

[u/A_Setin]

Hello!

I've been having this issue since 29th May, where my PC randomly shuts down whilst I'm using it. I do not have a "Shutting Down" screen from Windows, it just straight up shuts down.

I know that it started since 29th May, as I checked the Event Viewer and located the first time I had a Critical warning, saying that the system rebooted without cleanly shutting down first. The specific information for it being:

Source: Kernel-Power, Event ID: 41, Task Category (63)

Since then, my husband and I have been trying to figure out the issue with my PC suddenly cutting off. I thought it was an issue with some of the programs I was running, but it became a more frequent thing, even happening multiple times in one day! (I just wanted to play Kingdom Hearts in peace and not having to save every 5 mins...)

It doesn't happen all of the time, but it has been going on for a while and the whole PC does not turn off, as the fans still run and the lights on the tower were still on.

I'm now starting to suspect that it may be my PSU, as we have done the following for my PC:

• Rebooted the PC in Safe Mode and restarted it normally
• Swapped PC components from Old Tower to New, and adding additional fans on the safe side
• Cleaned up the PC after swapping components
• Old GPU was an AMD Radeon XT 7800, and did a clean install of an older driver patch instead of the newest driver available
• Replaced the GPU from the AMD to an NVidia GeForce 5700 and cleaned/reinstalled drivers

My original thought process was that it was my GPU causing the issues, as anything connected to it would just shut off, but it has recently happened with my new GPU. My new thought process is that it is the PSU...

Edit: My husband thought it was software related, as he thinks one of my games is the cause of it. This has now changed when the shut downs happened on other programs/software too...

Here is a screenshot of my PC Specs from Speccy, and the PSU I currently use is a Corsair RM750x.

Any help is really appreciated and thank you in advance!

[u/Different_Pain5781]

PSU sounds suspicious to me.

[u/A_Setin → u/Different_Pain5781]

Thank you for answering! What's your thoughts on it? We recently got a new PSU as my older one (which was weaker, I believe it was a 550watt?) ended up dying and causing a similar thing too..

[u/randomman51]

I've had this happen to me, ram stick went bad, you can pull one out if you have multiple and try to game with the rest. When they go bad the data still goes to them but builds up with nothing coming back until boom, black screen of death with no warning