What is the difference between CPU and GPU units?

Questions and Answers : Windows : What is the difference between CPU and GPU units?
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Profile David@home
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Message 1887747 - Posted: 3 Sep 2017, 17:07:05 UTC

Hi

Not crunched in awhile so trying to work out all the changes. One of the things I cannot figure is the workunit type ending in cuda. Are these run on the graphics card only? If so how does the science differ or is it the same science but different way to compute?

I also have workunits with different numbers after cuda e.g. cuda50, cuda42. What does this number mean please?
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Message 1887749 - Posted: 3 Sep 2017, 17:17:42 UTC
Last modified: 3 Sep 2017, 17:18:20 UTC

The workunits are exactly the same. The scheduler just sends out the type of work that the client's platform CPU or GPU can process; the local BOINC client then assigns them to the relevant CUDA or OpenCL platform that is installed.
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Message 1887756 - Posted: 3 Sep 2017, 17:52:13 UTC
Last modified: 3 Sep 2017, 17:52:27 UTC

CUDA42 and CUDA50 indicate the version of CUDA to be used. During the first few days (weeks) using a new rig each of the versions of CUDA will be tried to establish the fastest on that rig. You may also see OpenCL or SoG, these are again variations on the application that use different underlying technologies.
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Message 1887772 - Posted: 3 Sep 2017, 19:47:10 UTC

Thanks for the replies, I have managed to get my perferences setup so now running both GPU and CPU work units.
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Questions and Answers : Windows : What is the difference between CPU and GPU units?


 
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