[SOLVED] Always Power Supply Issue when PC shuts down randomly?

[ctgunner]

I recently built a new PC and everything was going really well and then all of a sudden it just started shutting down completely.

It's happened twice recently:

1. Right after launching Overwatch (not previously under any sort of load)
2. During a game with 2 Chrome windows open, one on 2nd monitor, one in background playing a video

Thermals look really good, CPU isn't being taxed... I really have no idea where to start.

Is it always a bad power supply as the culprit? Could it be the BIOS needs updated, is that ever the cause?

System:
5600x Ryzen (not overclocked)
Gigabyte B550m Pro-P
Nvidia 3080 EVGA FTW3
3600 C16 Gskill Neo 2x16GB
Sabrent 1TB m.2
750w Platinum Seasonic Powersupply

Much appreciated.

 

[jonnyguru]

Nvidia 3080 EVGA FTW3
750w Platinum Seasonic Powersupply

I think I might see the issue.

Do you have a tool to remove pins from the 24-pin cable?

 

[ctgunner]

I think I might see the issue.

Do you have a tool to remove pins from the 24-pin cable?

Not that I know of, what are you thinking?

 

[jonnyguru]

Pop the +12V sense out of the connector that plugs into the PSU and see if it stabilizes.

 

[sloan1209]

Pop the +12V sense out of the connector that plugs into the PSU and see if it stabilizes.

What does this do? I'm having similar issues

 

[jonnyguru]

What does this do? I'm having similar issues

Same PSU?

 

[refillable]

Same PSU?

You're saying that Seasonic PSUs now have problems with its +12V Sense on the motherboard? I thought it was the OCP on the Focus gold/platinum? Are we talking about the same PSU here?

 

[jonnyguru]

...now...

Now? How about always? I don't think the problem everyone was pinning on OCP is OCP at all. I think it's noise on the sense wire. As one of my engineers said, "Seasonic does something funky with their sense circuit".

I wish Tom's forums had inline image support. I could show you an example.

I haven't tried a Focus. Just a Prime. I should see if I have a Focus lying around.

 

[refillable]

Now? How about always? I don't think the problem everyone was pinning on OCP is OCP at all. I think it's noise on the sense wire. As one of my engineers said, "Seasonic does something funky with their sense circuit".

I wish Tom's forums had inline image support. I could show you an example.

I haven't tried a Focus. Just a Prime. I should see if I have a Focus lying around.

Ahh... So you're talking about the Prime. I have heard issues on that as well, but I didn't know if it's related to the 12 V Sense. It's not as pronounced as the Focus issue, though. I have always assumed that it was the OCP.

I thought you were talking about the Focus and you have found something new, hence "now".

Also, does it happen on Corsair AX Titanium line up?

 

[jonnyguru]

Ahh... So you're talking about the Prime. I have heard issues on that as well, but I didn't know if it's related to the 12 V Sense. It's not as pronounced as the Focus issue, though. I have always assumed that it was the OCP.

I thought you were talking about the Focus and you have found something new, hence "now".

Also, does it happen on Corsair AX Titanium line up?

Yes. That's why I was testing it.

I didn't test the Focus because there's no Corsair PSUs that use that platform. I'm in it for me.