PC Master Race

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What happens if you turn on the PC without plugging the power cable for the GPU? (lemmy.world)

submitted 11 months ago by 0Xero0@lemmy.world to c/pcmasterrace@lemmy.world

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So I was changing the case fans, after I put everything back together, I forgot to plug in the power for the GPU. I turned the pc on and I saw the white LED on GPU power port lid up and heard the fan spins like crazy (I don't know if it was the CPU fan or the GPU fans), I panicked and immediately turned off the power supply.

Everything happened in less than 2 seconds, I've run some stress tests and gamed for a few hours and nothing bad happened (yet?) so I assumed everything is still fine (for now?).

What happens if I had left it on like that for longer? And why did the fan ram up like that?

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[–] I_Miss_Daniel@lemmy.world 7 points 11 months ago (1 children)

I did that once. Some message appeared on the attached monitor about the GPU not having enough power to run. Many years ago now.

[–] DudeDudenson@lemmings.world 4 points 11 months ago

This is basically it, the cards know when the external power is connected or not and they use the power from the PCI slot to display a warning and that's it