With the now-shipping AMD EPYC 9006 "Venice" SP7 server processors sporting up to 256 Zen 6(C) cores per socket, or 512 cores in a 2P configuration, you may be wondering if Simultaneous Multithreading (SMT) is still worthwhile on these increasingly high core count processors. Long story short, SMT on AMD Zen 6 is still definitely worthwhile from a performance and power perspective. I was curious myself and ran some benchmarks to explore the SMT impact on the 256-core EPYC 9996 as well as the 96-core high frequency EPYC 9686F processors.
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