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>This year’s new EPYC 9754 goes even further, offering a single CPU with 128 cores and 256 threads. This means a standard dual-socket server could have an astonishing 512 cores!

The author pulled it from an article linked in the previous sentence. The numbers don't even add up unless it was a mistake or I'm missing something.

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I think the terminology is a bit muddied here because AMD has historically referred to physical cores as "modules" and logical cores as "cores" (although their current spec sheet [1] seems to use "cores" and "threads" in the way that most understand them).

So in a dual-socket setup, 2 x EPYC 9754 would indeed yield 512 threads (logical cores), which are backed by 256 physical cores.

[1] https://www.amd.com/en/products/cpu/amd-epyc-9754

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