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NNTP-Posting-Date: Wed, 20 Nov 2002 22:11:49 -0600
From: "Michael George"
Subject: Re: efficiency of the PC power supply
Date: Wed, 20 Nov 2002 23:13:49 -0500
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"Adam Seychell" wrote in message
> Any one know what is typical efficiency of ATX power supply on one of
> the current model computers. There seems to be little consumer
> interest in desktop PC power consumtion and so almost no manufactures
> publish efficiency ratings. The ATX power supply spec only requires a
> minimum efficiency of 68% at full load. My guess is that manufactures
> (especially of those $15~$25 units) do every thing they can to reduce
> cost and not be concerned with efficiency provided it meats the 68%
> spec. So technically a "300W" ATX the power supply can consume up to
> 441W. But at 150W output for example may still be allowed to consume
> 300W ?
> I'd be interested if anyone here has done measurements.
Toms Hardware recently fried or tried to fry about 21 power supplies and has
the review/ test results. I am note sure if he specifically measured
efficiency, (eff = power_out / power_in), but you might be able to get a
Here is the link:
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