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I am trying to understand which cores have the maximum undervolting potential on my Ryzen CPU for per-core curve optimizer settings. This is on a Linux system and Ryzen Master is not an option. Given the following per-core information, which core should have the best and worst potential and why?

Core CPPC highest perf Freq Power Voltage Temp
1 231 3.7GHz 4.54W 0.89V 64.8C
2 216 3.7GHz 4.46W 0.89V 61.6C
3 201 3.7GHz 4.05W 0.90V 59.1C
4 171 3.7GHz 4.05W 0.91V 60.0C

The CPPC value is per /sys/devices/system/cpu/cpu<#>/acpi_cppc/highest_perf, the freq/power/voltage/temp values are sampled during a sustained all core workload when all cores are performing an identical task. Please let me know if any other information needed to determine the answer.

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  • As with most overclocking questions actually trying it out will likely give the brest results.
    – Seth
    Jan 3, 2022 at 8:28

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