powerd and increase in energy need

[perryh at pluto.rain.com]

Kevin Oberman <kob6558 at gmail.com> wrote:

> Throttling ... is intended for thermal control, not power
> management. The power savings will be negligible ...

How can it possibly provide any thermal benefit, if it does not
reduce power consumption?  Is there some significant heat source,
other than power consumed, that throttling reduces?