The Spectre Mitigation Performance Impact On AMD Ryzen 5000 "Zen 3" Processors
Written by Michael Larabel in Processors on 2 December 2020. Page 5 of 6. 8 Comments

With some of the web browser benchmarks we are also seeing the performance improvement from disabling mitigations on the Ryen 5 5600X being larger than the mitigation performance delta on Zen+ and Zen 2. Again, it is presumably due to the Ryzen 5000 series defaulting to always-on STIBP rather than the conditional behavior seen on Zen 2 as well as Intel CPUs.

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