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I doubt that the 32-core EPYC they focused on is even the most economical solution in this situation.

If they're really RAM-bandwidth constrained, then the 24-core 74F3 (which still has all 256MBs of L3 cache) or even 8-core 72F3 may be better.

L3 won’t matter.

The more compute clusters the more PCI lanes in EPYC and the SSD lanes go direct per 8cores.

I recall when I was at Intel in the 90s and 3MB of L3 was a big deal.

The 8 core still has 128 lanes and 8 channels of memory, though.