Mailinglist Archive: opensuse (3572 mails)
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Re: [opensuse] [OT] How much power does a PC really consume?
- From: Per Jessen <per@xxxxxxxxxxxx>
- Date: Thu, 14 Feb 2008 21:28:34 +0100
- Message-id: <fp289i$jat$3@xxxxxxxxxxxxxxxx>
Carlos E. R. wrote:
RMS measurements are not exactly new, Carlos. What's new is that they
can now be done with cheap consume-style equipment.
/Per Jessen, Zürich
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The problem in this case is that the load is neither: it is
"switched". To calculate the real power used you need to sample the
waveform, at least 15 samples per period, both voltage and current,
then multiply and integrate (root mean square, RMS). You need some
type of cpu. Actually, there is a chip that does all this, and I guess
it is why these measurement gadgets have appeared in the market.
RMS measurements are not exactly new, Carlos. What's new is that they
can now be done with cheap consume-style equipment.
/Per Jessen, Zürich
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