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Zen 5's AVX-512 Frequency Behavior
Zen 5 is AMD's first core to use full-width AVX-512 datapaths.
Through the use of improved on-die sensors, AC capacitance (Cac) monitors, and di/dt-based adaptive clocking, "Zen 5" can achieve full AVX512 performance at peak core frequency. Quickly switching between scalar integer and heavy AVX-512 code basically spreads out the transition, so that the core eventually converges at a sustainable clock speed for the AVX-512 sequence in question. Load-related clock frequency changes are slow in both directions, likely to avoid repeated IPC throttling and preserve high performance for scalar integer code in close proximity to heavy AVX-512 sequences.
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