The 300MHz, 400MHz, and 500MHz points requiring only 1.1, 1.3, and 1.5v and with only the last point getting slightly above body temperature, even with no cooling, seem like something that should maybe not be "officially" supported, but maybe mentioned somewhere in an official blog post or docs. Getting 3x+ the performance with some config changes is noteworthy. It would be interesting to run an experiment to see if there's any measurable degradation of stability or increased likelihood at failure at those settings compared to a stock unit running the same workload for the same time.