Power Determinism Mode Still Proves Beneficial For AMD EPYC 9005 Performance
Right from the start the AMD EPYC 9005 series processors were showing some nice speed-ups from the power determinism mode. Both the EPYC 9655 and EPYC 9755 were shaving several seconds off their compile times compared to the default performance determinism mode. But this did lead to the average CPU power consumption going up by 20~30 Watts. But even in the power determinism mode the CPUs still respect their 400 Watt and 500 Watt default TDP limits, respectively.
The AMD EPYC 9005 processors have been delivering nice performance as it is with the default performance determinism mode, but if trying to squeeze out the best performance possible, the power determinism mode can provide some additional uplift.
The uplift of the power determinism mode is similar to what we've seen with prior generation EPYC processors.
The performance-per-Watt typically is best with the (default) performance determinism mode but still the power determinism mode doesn't impact the efficiency too much.