[voidnap]

> I’ve played with PBO2 adjustment as I said, but it should be possible to reduce the voltage at the expense of a bit of performance.

Undervolting with PBO2 should not decrease peformance unless you have done something very wrong.

Ryzen CPUs have limit, max temperature, frequency, power, and voltage. The voltage curve follows a frequency curve so higher clock speed requires a higher voltage. A negative offset in PBO reduces the voltage required for a given frequency. It shifts down the voltage curve. Lower voltage typically means less heat and power draw so you can achive a higher clock speed without hitting temperature, power, or voltage maximums.

If your system is stable when undervolting you don't see a loss in performance, generally it improves because you are able to reach higher clock speeds before running into voltage or power limits. The exception is if you induce a rare issue called clock skew at extreme cases that i'm not even sure you can do with PBO2.