The Spectre Mitigation Performance Impact On AMD Ryzen 5000 "Zen 3" Processors

Written by Michael Larabel in Processors on 2 December 2020 at 03:29 PM EST. Page 3 of 6. 8 Comments.
AMD Ryzen 5000 Zen 3 Mitigation Test
AMD Ryzen 5000 Zen 3 Mitigation Test
AMD Ryzen 5000 Zen 3 Mitigation Test

In the Ethr network tests for example with Ryzen 5 5600X there is greater mitigation overhead, presumably due to the always-on STIBP that is currently happening with Zen 3.

AMD Ryzen 5000 Zen 3 Mitigation Test

So disabling mitigations on Zen 3 CPUs for now can yield extra uplift, but we'll see ahead if AMD intentionally has their microcode to enable always-on STIBP or if like Zen 2 they will end up changing that to conditional handling.

AMD Ryzen 5000 Zen 3 Mitigation Test
AMD Ryzen 5000 Zen 3 Mitigation Test

With the mitigated state, it's still the same "default" performance is still the same excellent generational uplift from Zen 2 to Zen 3 we've been seeing since launch day with always doing our CPU reviews at the default mitigation levels.

AMD Ryzen 5000 Zen 3 Mitigation Test
AMD Ryzen 5000 Zen 3 Mitigation Test
Related Articles
BIOS Optimizations For AMD 5th Gen EPYC Yield Greater HPC Performance & Power Efficiency
Early Benchmarks: AMD EPYC 9005 Performance & Power Efficiency To Lead Further With Linux 6.13
Google Axion CPU With GCE C4A vs. AWS Graviton4 Performance
NVIDIA GH200 Grace CPU vs. AMD EPYC 9005 Turin CPU Performance
AMD Ryzen 7 9800X3D Linux Performance: Zen 5 With 3D V-Cache
Power Determinism Mode Still Proves Beneficial For AMD EPYC 9005 Performance