APU or CPU with more cores?

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Ryan Munro

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Message 2006285 - Posted: 8 Aug 2019, 10:37:38 UTC

Any idea which would be better? a Ryzen 2400g running say 7 CPU units and one GPU unit vs say a 2700 running 16 CPU units, which would put out the most work?
Looking at putting together a small dedicated box and unsure which CPU option would be best?
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Profile Tom M
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Message 2006295 - Posted: 8 Aug 2019, 11:49:36 UTC - in response to Message 2006285.  

Any idea which would be better? a Ryzen 2400g running say 7 CPU units and one GPU unit vs say a 2700 running 16 CPU units, which would put out the most work?
Looking at putting together a small dedicated box and unsure which CPU option would be best?


I have a 2400g running under Windows. It is a "Zen" cpu, not a Zen+ cpu.
The Vega gpu is a BTN (Better Than Nothing) gpu not a high performance cruncher.

I also have a 2700 and with sufficient cooling (especially with after-market cooling) it should run 14 threads quite briskly. Even with the stock cooler you MIGHT be able to run 3.7Ghz.

To maximize cpu performance on a larger thread cpu, the Boinc Manager needs to be set to use 90% of available cores. To maximize on a 4c/8t cpu it needs to be set at 75% of available cores.

The 2400g gpu does crunch faster than the cpu's on the 2400g but the cpus on the 2400g crunch slower than the 2700 Zen+ cpu (I think).

Tom
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Message 2006322 - Posted: 8 Aug 2019, 13:24:34 UTC - in response to Message 2006295.  

Yea I was wondering if the GPU in the 2400g would make up for / exceed the performance of the extra 4 cores on say the 2700
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Message 2006336 - Posted: 8 Aug 2019, 15:41:12 UTC - in response to Message 2006322.  

My gut feeling is no, but I have nothing to back that up with. I assume you would not be using a discrete GPU with the 2700?
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Message 2006464 - Posted: 9 Aug 2019, 12:30:05 UTC - in response to Message 2006322.  

Yea I was wondering if the GPU in the 2400g would make up for / exceed the performance of the extra 4 cores on say the 2700


If you are running SMT it would be 6 threads vs. 14 threads. So there would an 8 thread difference. Assuming the 75% / 90% cpu settings I mentioned earlier.

My 2400g gpu takes an 30-55 minutes per MB task. My 2400g cpu takes 2 hours per task. Under Windows 10.

I can't compare my 2700 directly because it is running Linux with optimization. It is currently running about an hour / cpu task.

I have an Intel running Windows 10. It is processing cpu tasks at 2 hours or faster.

So I believe that a 2700 on a robust MB (good VRM's) with good cooling should have more production (without gpu crunching) than a 2400g with gpu crunching.

Tom
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Message boards : Number crunching : APU or CPU with more cores?


 
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