[David712]

I am planning to buy a new computer for running CFD simulations. There are two suitable devices within my budget. One is with 2*xeon 8124 CPU and the other is AMD 2990wx CPU. I have no idea for which one is more suitable?
(By the way, xeon 8124 is a 64-bit 18-core CPU and its cache organization is 1.125/18/24.75 MB. AMD 2992wx is a 32-core cpu and its cache organization is 3/16/64 MB)

[flotus1]

Please do a quick forum search for TR 2990WX. The topic pops up regularly, it is a horrible choice for a dedicated CFD workstation.

Two Xeon Platinum CPUs with 18 cores each will perform better, especially for CFD. But the 8124 is not a particularly good value either. Even used, they go for 1850€ on ebay. And the main features of the more expensive Platinum CPUs are: more cores at the high end, ability to use up to 8 CPUs in a shared memory system. You need neither of these.

If you want better recommendations, provide us with more information. Budget, software, licenses, DIY or prebuilt, used or new...

[gnwt4a]

stay well away from zen1 chips. they useless for cfd.
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[flotus1]

Originally Posted by gnwt4a

stay well away from zen1 chips. they useless for cfd.
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My personal experience with a variety of CFD applications, as well as this thread here, suggest otherwise.
Second gen Threadripper CPUs with 24 and 32 cores are the exception, not the rule. And even these two are not terrible for CFD, they are just terrible value compared to the 16-core variant.

[David712]

Thank you so much. I would choose Intel Xeon CPU instead of the amd's series.

[flotus1]

Just for the record: I did not necessarily recommend going down this route. It is just the faster alternative out of your two options