[gjsman-1000]

I’d suggest investigating single core performance. If you have the money, buy an i9-12900K (slightly faster single-core than M1 but much hotter) and do some testing on that. If my theory is correct, performance will be even better.

[groundthrower]

We have examined that as well, last week we tried a AMD 5950X which has half the amount of cores but much better single core performance - the result was still at 60% of the Epyc performance

[gjsman-1000]

What was the M1 % relative to your Epyc?

[groundthrower]

Roughly 10% faster

[CobaltFire]

Have you investigated memory constraints?

Ryzen is 2 channels; Epyc is 4-8 (depending on CPU). M1 has that stupidly fast/wide setup.

If your Epyc is one of the 4 channel optimized SKUs or is only running in 4 channel mode, you would get pretty close to the quoted ratios on a memory bandwidth test.

Correlation, not causation, but worth looking into.

[fomine3]

Also check Node per Socket (NPS) settings on EPYC

[gjsman-1000]

HN makes us wait for replies… so if we need to continue this further I’m open at [e-mail] .

My next question would be if you ran the 12900K in dual-channel memory.