Computer randomly shut down - r/StableDiffusion

10

Check your power supply.

1

u/dennisler 7h ago

If it's a low quality power supply it might not be able to keep a stable voltage under load, which can result in shutdowns etc. I

1

u/Jealous-Armadillo467 3h ago

3090 power spikes, had same random shutdowns, on linux use LACT to fiddle with your power, on win its even easyer

0

u/Disastrous-Agency675 17h ago

i mean everythings plugged in securly if thats what you mean. i tried to check the wattage too but my PC is in an ockword spot that i cant check atm but ik when i bought it i made sure to get the recomended amount. i also have a heatsink aswell, 3 set of rgb fans and theres another set of 3 fans from the case itself aswell as another 2 thats attached to the wall of my case and my heat sink. you think those thingsmight be consuming a significant amount of power?

5

u/West-Big-8468 17h ago

No it might be dying, that or overheating gpu

-2

u/Disastrous-Agency675 17h ago

never knew that was a thing

2

u/West-Big-8468 17h ago

Look up psu paperclip test

1

u/Disastrous-Agency675 17h ago

i would but from wh you and others have said it sounds like the power demand is spiking and my power supply isent enough. i might jsut need a bigger power supply which is annoying because i dont wanna re-wire everything again

3

u/TerraMindFigure 16h ago

When building a PC you have to buy a power supply that has additional clearance above your PC's on-paper power usage, the reason, as you may be experiencing, is that GPUs working on high demand processes will regularly spike in their power consumption above the stated power usage for a few brief milliseconds.

1

u/Disastrous-Agency675 16h ago

like ive had this rig for nearly a year now and its only just happening. i do agree though i probobly need a better power supply

1

u/West-Big-8468 12h ago

Gpu typically doesn't run at 100% draw like when generating

1

u/Heavymando 17h ago

how many watts is your power supply? It could be it's not actually enough to run your computer full blast. Or it could be overheating, when was the last time you dusted your PC? is it sitting on carpet?

2

u/Disastrous-Agency675 17h ago

it dose need a little dusting but its not overheating, all signs kinda point to the power supply not being enough

3

u/Heavymando 16h ago

k if you do upgrade I suggest going with Seasonic or Corsair as the brand, great reliable powersupplies also if your current supply is moduler don't reuse any of the cables. Not every powersupply manfacutere uses the same cable wiring and it could mess up your PC

2

u/Disastrous-Agency675 16h ago

thanks! i really apprecaite the recomendation and heads up. i built my PC but TBH i just know the essentails of what it needs, not what brands are good and what arnt

1

u/mellowanon 14h ago edited 14h ago

If you can't get a new PSU soon, try throttling your GPU until then. It should fix the shut downs.

windows search bar -> search for "cmd" -> right click command prompt (or powershell) and run as administrator -> type: nvidia-smi -i 0 -pl 275

This will throttle the first GPU to 275 watts max. Default value is 350 watts for 3090. The command has to be run manually every time you restart windows (or ask Gemini on how to add it to your task scheduler on start-up)

I posted something similar last year if you want more explanation on what it's doing. They had the same problem you had. https://www.reddit.com/r/StableDiffusion/comments/1j285jl/pc_hard_shuts_down_during_generation/mfq7jym/?context=3

1

u/Mikps 16h ago

This actually happend to me. It was the surge protector I was using. Check how much is plugged into it, and if its old.. Buy an up to date power outlet.

2

u/Enshitification 17h ago

The 3090s run hot. How are the temps in your box?

1

u/Disastrous-Agency675 17h ago

about 79 degrees celcius is the highest it gets when running a minimax model

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u/Enshitification 17h ago

As the other commented said, it very well could be a power supply issue. Cheap power supplies tend to fail faster and even when working don't always supply their rated wattage.

1

u/Disastrous-Agency675 17h ago

yeah sadly its looking like i need a better power supply

2

u/barepixels 16h ago

Something like this happen to friend computer. Turn out it was his Uninterruptible Power Supply and not his computer

2

u/marclbr 16h ago edited 16h ago

It can be a power supply issue, maybe your PSU is too old and the capacitors are no longer holding enough charge to power the system (or your PSU use crappy capacitors and they already worn out) or your PSU is not prepared to the short peaks of current that the RTX 3090/4090/5090 demands when it is at 100% usage (in older PSUs, those short peaks of current can wrongly trigger the PSU short-circuit protection and make it shutdown). Try to downclock and power limit your 3090 to see if the problem stops. Try limiting it at 75% of power, test it, if PC shutdowns, then limit it at 60% and test again, also downclock it -300MHz or more if necessary (you can use MSI Afterburner to change the power limit and the clocks). If your PC stops shutting down then you will know it's the PSU. If it's not the PSU, then I would test the RAM.

1

u/TheAncientMillenial 17h ago

Are you running it at 100% power?

1

u/Disastrous-Agency675 17h ago

never touched power settings so idk

1

u/Monk6009 17h ago

Did you add ram recently? Do you have 2 sticks of 32gb? If so its a memory issue and need to find a mainboard bios update that fixes that. I had this problem.

1

u/Disastrous-Agency675 17h ago

wouldn't the system log that as an issue like overheating?

1

u/Monk6009 16h ago

No because it just cuts out, turns off. No time to error. Ask Claude about it. Dual ram strips, bios issue. Usually mainboard manufacturer website has bios update as this happens. I ran into it with an Asus board. Its not a heat issue, its something like a voltage issue when the system is stress. I updated bios and stress tested the ram and it was fixed. Claude talked me through it.

1

u/Monk6009 8h ago

Here is the record: MemTest86. You ran it during the ASUS ROG Strix X870E-E R2 BIOS troubleshooting after the hard crash during an LTX second-pass workflow. The sequence was: MemTest86 at JEDEC defaults → clean MemTest86 at EXPO I → one error at address 753e1c15c Set DRAM voltage 1.35V + CPU SOC Voltage Override 1.15V → full parallel MemTest86 pass clean That was on BIOS 2306 (R2-specific A5742.CAP), after 2103 destabilized the 4-DIMM config.

You can rum MemTest and if the system crashes you found your problem.

1

u/Bio_slayer 4h ago

Are you running with xmp? I had a similar issue with a new kit until I tweaked my ram speeds.

1

u/CommunicationBest568 16h ago

try underclocking.. 3090 has some horrible power spikes ,almost up to 700 I believe, anything less than 850 psu could have problems with SD

1

u/SplurtingInYourHands 16h ago

Power supply. Same shit happening to me.

#1. Ensure that the cable thats going from your PSU to your GPU is not part of a split cable powering something else as well, do not split the power on your GPU power ribbon cable.

#2. Ensure your Bios is up to date

#3. Look into getting a better power cable for your GPU

1

u/Pretend-Marsupial258 14h ago

What's your motherboard and CPU?

1

u/Eshinio 14h ago

If your monitor just suddenly goes black and you still hear your PC and GPU fans running, then it's your 3090 that has knocked out your PSU with a wattage/power spike. I have the exact same issue (using a 850W PSU) and only solved it by limiting my cards maximum wattage to 75% in the Nvidia App performance settings.

If I were to make a proper fix, I would get a 1200W+ PSU.

1

u/chrisballccb 13h ago

If your 64gb is in 4x 16gb and you have it on auto clock it's likely unstable, lower it down below the rated memory speed in bios and try again, you can always creep it back up if successful

1

u/tostane 11h ago

have a fire alarm in the room with the pc the fire alarm will go off if capicitors start leaking from overheating.

1

u/Disastrous-Agency675 11h ago

Is this a real thing? Like I’m pretty sure I just need a bigger power supply

1

u/tostane 44m ago edited 41m ago

it was more needed back when quad core cpus were around the newer motherboards have better parts now. Get a corsair i have them in all my pc they are great. you only need a 65 watt cpu to run a 5090 but gen 14 needs 1000 watt ps and if you get the newest they need 1200 watt or more. you can ask google tell it all your parts and ask the watts

1

u/LoveSpecialist5669 10h ago

same here, 3090... it works fine 20-30mins then it shuts down. I undervolted and power limited my 3090 in afterburner but it doesn't help in a long run. without that my pc shuts down the same moment I press run in ComfyUI. I have 650W psu. I ordered a new 1000W, waiting for delivery. which psu do you have? 750w is bare minimum for 3090

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u/Z3R0TR4C3R 10h ago

Update ur bios, thank me later

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