Zen 6 measured: 5.96 adds/cycle vs Zen 5's 5.25, faster branch recovery, ~20% gain
lemire · x · 2026-11-11
Citing Chips and Cheese's Zen 6 analysis, Daniel Lemire sums up the microarchitecture changes vs Zen 5:
- Sustains 5.96 64-bit adds per cycle versus 5.25 on Zen 5, despite the same six ALUs
- Recovers from branch mispredictions faster: 3–3.5 ns extra penalty vs 3.5–4 ns on Zen 5, a meaningful gain for branchy code
- A SPEC CPU2026 single-threaded estimated-score chart shows Zen 6 (EPYC 9686F: 6.20 integer / 10.6 FP) already matching the previous generation's best
Bottom line: realistic performance uplift of about 20% at comparable clocks.
Related event: AMD Zen 6 Microarchitecture Benchmarked: Faster Branch Recovery(2 posts)→
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