ed@xxxxxxxxxx wrote:
On Mon, 1 Oct 2007, Karl Larsen wrote:
So if you buy a 450 Watt power supply to run a server that does
nothing most of the time, the power supply will not draw 450 watts.
It will draw perhaps 100 Watts. This is good. The power supply is
lightly loaded and will last much longer than if it is drawing 400
watts.
So do not worry about what the power supply is rated at. It will
adjust to a smaller load.
Everything you said was true, and it still does not help to have a
lightly loaded 450 watt power supply drawing 100 Watts... If your
target is to draw 30 watts from the wall. In fact you validated my
point that matching the power supply is better then over buying excess
capacity.
ed
p.s. You're not the only one here with an EE degree.
I know that. I was not aware the goal was to draw 30 Watts or less.
I do not think you can do that with a power supply mass produced for
computers. You need more than that to boot up the system. The hard
drives use like 20 watts when loaded. If you have two working it will be
too much for a power source you are trying to use. Forget that 30 Watt
limit. It will not work.
--
Karl F. Larsen, AKA K5DI
Linux User
#450462 http://counter.li.org.
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