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EPYC 7351, 7451 or 7601 for CFD, which is the best?

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Old   May 29, 2019, 06:48
Default EPYC 7351, 7451 or 7601 for CFD, which is the best?
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Guangyu Zhu
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I'm planning to set a new 2 CPUs workstation.

The major configurations:
RAM: 16GB 2R DDR4-2666 ECC*16
SSD: Intel 760P 512GB M.2
MB: Supermicro
Video card: second-hand Quadro 6000.

What I'm not sure is the selection of CPUs...

I ran my cases on the test machines provided by local vendor, 7601*2 and 7451*2. It was 10% faster on the 7601 platform with 56cores utilized than 7451 platform with 40 cores assigned. I have no chance to test 7351.

Price of 7601 is almost doubled the price of 7451 ($2300 vs $1200), 7351 is 40% cheaper than 7451 ($700 vs $1200). Though all options are within the budget, I'm wondering which CPU would bring the highest cost-effectiveness ratio... So that I may upgrade the SSD or 10G ethernet.

Thank for the suggestions in advance.
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Old   May 30, 2019, 17:20
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Robert
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There is a thread on here that looks at a bunch of different configurations.



OpenFOAM benchmarks on various hardware


Alternatively if they are not covered there then Specfp_rate for a similar system to those you are considering is generally pretty accurate in assessing relative performance of similar architecture systems.
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Old   May 31, 2019, 06:58
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Surely the most cost-effective one is the 7351. Returns start diminishing after 2 cores/memory channel. Could you get the high-speed 7371? Those might be as fast as the higher core count CPU:s, while being a lot cheaper. As a bonus they are supreme in single-threaded applications
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