Cuda Cores VS GPU Speed Question

Questions and Answers : GPU applications : Cuda Cores VS GPU Speed Question
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Message 1974803 - Posted: 11 Jan 2019, 21:39:03 UTC
Last modified: 11 Jan 2019, 21:43:03 UTC

Is the amount of Cuda Cores more important than the GPU speed?
Also what architectures are more productive performance wise? Maxwel, Pascal, Turing?
Last question, in a multi GPU machine, does each GPU take on its own individual WU or does all GPUs take part in processing a single WU?
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Message 1974813 - Posted: 11 Jan 2019, 22:17:51 UTC - in response to Message 1974803.  

Last question, in a multi GPU machine, does each GPU take on its own individual WU or does all GPUs take part in processing a single WU?


Each work unit goes to one GPU, but one GPU might run more that one work unit at a time.
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Message 1974819 - Posted: 11 Jan 2019, 22:45:30 UTC - in response to Message 1974813.  
Last modified: 11 Jan 2019, 23:30:47 UTC

Can you force the GPU to do more than one WU?

Thanks
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Message 1974855 - Posted: 12 Jan 2019, 3:48:25 UTC - in response to Message 1974819.  

Can you force the GPU to do more than one WU?

Thanks


you're using the special app on your GTX 1080. you should not run more than one (1) WU at a time.
Seti@Home classic workunits: 29,492 CPU time: 134,419 hours

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Message 1974973 - Posted: 12 Jan 2019, 22:18:02 UTC - in response to Message 1974803.  

Is the amount of Cuda Cores more important than the GPU speed?
Also what architectures are more productive performance wise? Maxwel, Pascal, Turing?
Last question, in a multi GPU machine, does each GPU take on its own individual WU or does all GPUs take part in processing a single WU?


The number of CPUs or partial cpus that each GPU task needs depends on the hardware and the software. The default for most Seti CPU tasks is well below 1 CPU per GPU task. However, some GPU tasks run somewhat faster with a full CPU devoted to them. (probably the Windows SOG gpu task is an example of one that runs better with a full cpu driving it).

Based on this thread https://setiathome.berkeley.edu/forum_thread.php?id=81962 I would say the later the version of the architecture the more efficient the card is.

I am not certain about the answer to your first question but I do remember reading a thread that was asserting that faster GPU memory increased the Seti processing speed more than anything else.
That said, unless the card is VERY slow, more cores trumps a card with fewer cores.

HTH,

Tom
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Message 1975047 - Posted: 13 Jan 2019, 8:42:21 UTC

Also what architectures are more productive performance wise? Maxwel, Pascal, Turing?

Maxwel, slower than Pascal, slower than Turing

in a multi GPU machine, does each GPU take on its own individual WU or does all GPUs take part in processing a single WU?

For SETI each GPU works on one (or more) task(s), a single task is not shared between GPUs.
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Message 1975423 - Posted: 16 Jan 2019, 15:41:13 UTC

Sorry been away with work etc, thanks everyone who responded. Those answers clear up some questions I had regarding the GPU's and WU's. I might try to get a second refurbished 1080 for my primary machine.

JP
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Questions and Answers : GPU applications : Cuda Cores VS GPU Speed Question


 
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