PC shuts off and doesn’t boot up(I can boot into bios and stay there)

[Vicious]

Nothing new was installed, or moved, or even bumped

I was watching a youtube vid, right after playing a game, when the pc just shuts down.

Pressing the power button resulted in 1sec boot and off again, started removing one piece of hardware at a time, swapped ram etc

Nothing

Cleaned the AIO cpu cooler, thinking it’s overheating, nothing. New thermal paste as well.

Then for the laughs pressed the power button, and it booted just fine. 4 minutes in it does on me again. But I can reach the BIOS and it never turns off, checking temps, volts, everything is in range.

I’ve even tried another plug and cord.

My gut feel says psu cant take the load?

12700k
Z790 mboard
DDR5 32GB
RTX 3080
750 gold Thermaltake psu

 

[CpLKaNe]

Could be, a bit of searching shows 750w to be the bare minimum for a 3080, and with a strong cpu you'll definitely need even more as well, so maybe try a mate's 1kw? What other peripherals do you have connected?

 

[Vicious]

Could be, a bit of searching shows 750w to be the bare minimum for a 3080, and with a strong cpu you'll definitely need even more as well, so maybe try a mate's 1kw? What other peripherals do you have connected?

Spdif for monitor speakers
Wireless g502
Wires logitech keyboard
3x monitors 1440p
Mic
Webcam

Been running for months, dare I say over a year. No such issues

There was a odd issue recently, when the monitors go into stand by mode, if im not using the system after 15mins, the system would be off, checking log files show an unexpected occurrence (no shit, power disappeared)

The system runs off the sunsynk unit that feeds the house

 

[Vicious]

Left it unplugged through the night

Powered om, quickly copied my data over to a back up ssd

Checked the event viewer, but the only errors that stood out was kernel - unexpected power instance (can’t remember the name)

Several of them of course on the time the pc shuts off

 

[heinreich]

I've had something something similar. Turned out to be an issue with my main m.2 drive. Now the weird thing is it was perfectly healthy (99-100% on health and performance), and even worked fine in someone else's setup (from what I recall). I tried changing everything, and the only thing that fixed it was using another m.2 eventually.

Gigabyte motherboard?

 

[Vicious]

I've had something something similar. Turned out to be an issue with my main m.2 drive. Now the weird thing is it was perfectly healthy (99-100% on health and performance), and even worked fine in someone else's setup (from what I recall). I tried changing everything, and the only thing that fixed it was using another m.2 eventually.

Gigabyte motherboard?

Yeah GB board

If you say using another m.2, you mean moving it to another m.2 port?

 

[heinreich]

Yeah GB board

If you say using another m.2, you mean moving it to another m.2 port?

No, i had to physically get another m.2 drive. Think i originally had an Adata installed giving me the issues. Then move to Mushkin or Kingston which sorted everything

 

[Vicious]

Aah i see
Just swapped my serbent main drive to another port and it died 10secs in windows

So im heading out to a pc shop to test the psu firstly

 

[heinreich]

Aah i see
Just swapped my serbent main drive to another port and it died 10secs in windows

So im heading out to a pc shop to test the psu firstly

Well, that's exactly what i just said. Get another m.2 drive and only run it installed (leaving the serbent out). But goodluck. Maybe the psu is dying (which would show quicker in game, not 10 seconds into windows or watching youtube)

 

[Vicious]

So it seems it’s the mother of boards

Tested a different cpu and power supply (700w)

While using my machines 750w the rig came on, it was fine so we ran a bench test for 20mins to stress everything

With everything maxed out, the pc was pulling 533w at the plug

I5 12th tested, psu swapped and headers removed
Gpu removed, same.

The only culprit left was the motherboard (gigabyte)

He did have a good point, George and Mossel Bay have insane humidity levels, last 2 weeks it’s been even worse

It seems like something is shorting out

 

[Vicious]

Anyone in the George region with a Z690/790 DDR5 mboard laying around

Would like to test EVERYTHING

 

[Vicious]

The motherboard outside the case, hooked up with the power supply, same thing, removed the SSD's and GPU, everything, exact same thing.
0.5 sec powering up and instantly dead after that

Installing everything one by one, same effect, no difference, so it seems the motherboard is dead. RMA it is

 

[JeanPriere]

Did you come allright?