In the multi-threaded bench, the same results are reproduced. When switching to the Kraken X73 AIO cooler, the throttling is completely eradicated. Going from stock to PBO again shows no apparent benefits. However, AutoOC mode sees the average core clock bumped up by 20-30MHz and the single-core boost clock is also notably higher.
Overall, the multi-core frequencies are much tighter when using the AutoOC mode compared to stock. This is when using the 360mm Kraken X73 liquid cooler. When using the wraith prism cooler, the cores throttle really hard through the course of the benchmark.
Temps: Wraith Prism vs AIO Liquid Cooler
The temperatures tell a similar story. When using the stock cooler, the default temps were the highest while AutoOC produced the lowest thermals. This was most likely due to increased power draw at AutoOC which brought the temperature ceiling down by a notch.
The Kraken X73 manages to keep the Ryzen 9 3900X under 78 degrees in all three cases. Here, as expected the temperature is lowest when running the 3900X at stock mode, and it scales by a degree when switching to PBO and AutoOC, each. It’s weird that PBO has a higher temp than stock as the performance was worse. I’m guessing the power and temperature limits are different under each of the three modes and are dependent on each other.