Computer turns off when using two GPU about mcx

[kalvdans]

It sounds indeed like the power consumption. Each GPU draws 250W according to https://en.m.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units and the power supply also have to power the cpu, hard disk, fans.

Try trottling down the GPU:s using sudo nvidia-smi -pl 200

[Edouard2laire]

It sounds indeed like the power consumption. Each GPU draws 250W according to https://en.m.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units and the power supply also have to power the cpu, hard disk, fans.

The two GPUs would then use 500W leaving 250W for the cpu, fans ... shoudn't it be enough ? If that is the issue, how much power would you recommend?

Try trottling down the GPU:s using sudo nvidia-smi -pl 200

Thx. i'll try and let you know if that works.

Edouard

[fangq]

@Edouard2laire, I too suspect it is related to power issue, not a bug in mcx, but I also acknowledge that I have a few boxes using 750W to drive comparable GPUs with no issue.

I suspect that the issue might be caused by degenerated performance from either the power supply or your GPUs, especially this config has been working in the past - cleaning dust and ensuring sufficient air flow and fan speed could be one way to verify. You should use nvtop to see the power draw and temperature of your GPU when running simulations on individual GPU and see if you can capture any abnormality; you could also use sensors command to see GPU/chassis fan speed and temperature. if system has a crash, you can look at the system logs under /var/log.

replacing or upgrading your powersupply would be a more effective step if debugging won't reveal anything meaningful.

[fangq]

I am closing this ticket. if something related to mcx is identified, please feel free to reopen.