[mythtv-users] external power supply rant (Was: Zotac ION M/B..)
Simon Hobson
linux at thehobsons.co.uk
Wed May 13 18:46:46 UTC 2009
Raymond Wagner wrote:
>Who cares? DC-DC conversion is very efficient.
But still not 100% - what's the benchmark ? Something like 85%+ is
considered good ?
I agree with your point about them being switched off a lot of the
time, but I can think a fair number of them are going to go into
"always on" applications.
>The real problem of concern is that 'wall-warts' are cheaply built,
>typically linear, and always low efficiency. They will be dumping
>easily twice the waste heat of a traditional computer power supply.
Cheaply built - yes. But so are most PSUs :-/ For this sort of
application they won't be linear, even small ones these days are
mostly switch-mode, apart from anything else, I suspect switch mode
are cheaper to build as they use less copper and iron !
But my main objection stands - external power supplies are just "yet
another" box and cable to try and keep control of.
--
Simon Hobson
Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.
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