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On 8/24/2010 19:45, Douglas Choma wrote:
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On 8/24/10 4:33 PM, Raymond Wagner wrote:
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On 8/24/2010 18:36, Douglas Choma wrote:
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type="cite">
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Incidentally, it also requires so little power that I'm able
to use a picoPSU (<a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://www.mini-box.com/s.nl/it.A/id.417/.f">http://www.mini-box.com/s.nl/it.A/id.417/.f</a>).<br>
</blockquote>
<br>
For what it's worth, that 120W PicoPSU could run most desktop
systems without high end graphics.<br>
</blockquote>
<br>
That's odd. Is this mostly true for the newer generation of
desktop machines? It seems like most traditional desktop PSUs
start at 400W and go up from there.<br>
</blockquote>
<br>
Just because they sell supplies that large doesn't mean people need
or even come close to using anything like that kind of power. <br>
<br>
Most desktop dual core processors come in at 60-80W TDP. Only high
end quad and hex core processors pull more than 100W. Some are
available with 35-45W TDP. That is peak design power, and you're
going you are likely to never come close to hitting that. Low to
midrange graphics cards are going to pull anywhere from 10-60W under
load. Onboard graphics is going to be at the low end of this
spectrum. Memory is going to pull 5-10W per stick. Optical burners
and hard drives is where you really get hit hard. Under normal
usage, they're only going to pull a couple watts, but spin-up is
going to be 15-25W each, and burning can consume more.<br>
<br>
Just as a reference point, our compute nodes at work are 2.67GHz
C2Ds (E6700s), with 4GB of memory, intel graphics, and a 250GB hard
drive. At the wall, they pull 115W at initial power on, 45W idle,
and 75W under full load. Shave about 20% off of that for PSU
inefficiencies and you've got what load you could expect an average
PC would pull against a PicoPSU.<br>
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