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GPU vs GPU+CPU

Questions and Answers : Getting started : GPU vs GPU+CPU
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Maxim _Nazaruk

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Message 69685 - Posted: 11 Apr 2020, 8:07:30 UTC

Hello.
I've limited WUs to GPU only and it seems GPU gets less load compared to GPU+CPU mode.
Besides, GPU only WUs need much longer time to be crunched comparing to GPU+CPU mode.

Does it ruin performance running GPU only mode?
Is CPU essential for crunching WUs?

GPUs are AMD Vega 56 + RX 480. CPU i5-4670

Thanks.
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Profile mikey
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Message 69686 - Posted: 11 Apr 2020, 10:00:32 UTC - in response to Message 69685.  

Hello.
I've limited WUs to GPU only and it seems GPU gets less load compared to GPU+CPU mode.
Besides, GPU only WUs need much longer time to be crunched comparing to GPU+CPU mode.

Does it ruin performance running GPU only mode?
Is CPU essential for crunching WUs?

GPUs are AMD Vega 56 + RX 480. CPU i5-4670

Thanks.


It's more efficient to let the gpu use a cpu core to run the workunits, you need to keep the gpu fed and happy as it does 10 times the work giving you10 times the credit as a cpu core. The cpu and gpu workunits are doing the same thing just in different ways, so do things efficiently.
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Maxim _Nazaruk

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Message 69687 - Posted: 11 Apr 2020, 11:31:52 UTC - in response to Message 69686.  

Thank you for the explanation.
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Message 69688 - Posted: 12 Apr 2020, 2:40:52 UTC - in response to Message 69687.  

Thank you for the explanation.


You are very welcome.
Happy crunching.
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Hurr1cane78

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Message 74817 - Posted: 16 Dec 2022, 21:54:45 UTC - in response to Message 69685.  

my boinc playlist gpu calculations all videos https://www.youtube.com/watch?v=pYVW9oA9yWk&list=PL_r97NUMjf7x4TgZT3bwQYL8KV_Vbo2J8
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Questions and Answers : Getting started : GPU vs GPU+CPU

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