even disabled a gpu slot keeps a cpu core

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even disabled a gpu slot keeps a cpu core

Postby promeneur » Tue Nov 23, 2021 3:53 pm

Even if a GPU slot is disabled, then it keeps a CPU core. This is useless.

The result is the CPU slot gets less CPU core.
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Re: even disabled a gpu slot keeps a cpu core

Postby gunnarre » Tue Nov 23, 2021 3:57 pm

You can set the number of CPU threads on the CPU slot manually. When it's set to auto (-1) and full power it will subtract one thread per GPU slot.
https://foldingathome.org/support/faq/i ... al-setting
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Re: even disabled a gpu slot keeps a cpu core

Postby aetch » Tue Nov 23, 2021 6:55 pm

I would still keep a thread or two available for the operating system to use.
The CPU folding performance hardly changes but the GPU folding does suffer when you don't leave the airgap for the operating system.

I have my system set to receive "big" packets (proteins with a very large number of atoms), even with the airgap for the operating system I still see the GPU folding suffer but it's only for about 1.5 hours so, less worries.
AMD Ryzen 9 3900X, 16GB, RTX 2070 Super, Win 10 Pro, F@H 7.6.21
Intel i5-7600K, 16GB, GTX 1080 Ti, Win 10 Pro, F@H 7.6.21

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Re: even disabled a gpu slot keeps a cpu core

Postby gunnarre » Wed Nov 24, 2021 10:11 am

Yes, leaving a CPU thread per GPU and one left for the OS is good practice when GPU folding, but in this instance the GPU slot is disabled and not in use.
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