~misfit~ wrote:

> I was simply elucidating to answer the OP's second question; "is its heat
> output independent of the amount of power _drawn_ from it?" You answered
> with a reply talking about *consuming* power, I just wanted to cover
> *supplying* power.
>
> Cheers,

I must be too muzzy-eyed this morn. I still see no independence. The
more power _drawn_, the more power *consumed* by the PSU. At 80%
efficiency, a 100W load (drawn) would have the PSU consume 25W, and a
200W load (drawn) would have the PSU consume 50W, and a 300W load would
have the PSU consume 75W. As the load (drawn power) increases, so does
the power consumed by the PSU. No independence. More power consumed
(by the PSU), the more heat generated (by the PSU).