Question PC keeps shutting down constantly but inconsistently.

[Bijuu1]

A few days ago my older PC that i lent to my family keeps shutting down randomly. Rarely it'll stay running for an hour or two, but most often it shuts down shortly after starting up. I thought it was maybe a start up program. But seeing the inconsistency, sometimes it stays on for a while before crapping itself, im thinking its hardware. Thinking the PSU possibly? Could maybe be the boot drive? Not sure. Any help is appreciated.

i7-8700k
16GB DDR4
Gigabyte Z77-DS3H
MSI GTX 1080
PSU CX 600

 

[Grobe]

What error message / BSOD you see before shutdown ?

 

[Bijuu1]

What error message / BSOD you see before shutdown ?

There is no BSOD, it just completely shuts down then starts back up on its own. No errors pop up, no BSOD, nothing.

 

[Grobe]

There is no BSOD

No messages or visible changes at all before shutdown ?

 

[Bijuu1]

No messages or visible changes at all before shutdown ?

No, just shuts down. Monitor goes black, no error, no bsod, nothing. Then it boots back up by itself, its pretty much just constantly restarting.

 

[Grobe]

No, just shuts down. Monitor goes black, no error, no bsod, nothing. Then it boots back up by itself, its pretty much just constantly restarting.

Ok, so then this is a hard shutdown where it immediately loose power?

How old are your PSU ?

Bw found a thread from 2015 where it seems that this models get mixed review:

Mixed reviews on Corsair CX600/CX600M?

Hi all, I was just wondering if anyone could give me some information regarding the Corsair CX600 and CX600M Power supplies, as all the reviews I read seem to contradict each other. Some people say they are fine, others say they are cheap. I'm putting together a build using an FX-8320 and...

forums.tomshardware.com

 

[Bijuu1]

Ok, so then this is a hard shutdown where it immediately loose power?

How old are your PSU ?

Bw found a thread from 2015 where it seems that this models get mixed review:

Mixed reviews on Corsair CX600/CX600M?

Hi all, I was just wondering if anyone could give me some information regarding the Corsair CX600 and CX600M Power supplies, as all the reviews I read seem to contradict each other. Some people say they are fine, others say they are cheap. I'm putting together a build using an FX-8320 and...

forums.tomshardware.com

Yes, hard shutdown where it just loses power.

Sorry, its actually a Thermaltake 600W, and it is around 6 years old now?

 

[Grobe]

Ok. But anyways, I think the only way to confirm whether it is the CPU that is bad or not is to actually replace it and observe if the issue will come back.

Do you remember if there was other issues to the same computer, and if so - have those issues changed/evolved to the worse lately ?