[nSLUG] Atom server

Pat Gagnon patgagnon at gmail.com
Sun Apr 18 10:42:15 ADT 2010


That's pretty good considering the plug computers discussed earlier have a
power rating of 19W and that's without any hard drives.

Pat

-----Original Message-----
From: nslug-bounces at nslug.ns.ca [mailto:nslug-bounces at nslug.ns.ca] On Behalf
Of Daniel MacKay
Sent: Sunday, April 18, 2010 9:36 AM
To: Nova Scotia Linux User Group
Subject: Re: [nSLUG] Atom server

One of the reasons people have been excited about the Atom is their low
power usage. So I measured mine yesterday.

I had mounted the board in a case from a dead Sony Vaio - sort of like this:
http://ecx.images-amazon.com/images/I/41AW96TTCML.jpg  .. it has a
physically small -- about the size of my fist -- and fairly quiet power
supply, and room for two hard disks (and a CD/DVD dize drive, and a floppy
drive.)

I powered the unit with my Motomaster Eliminator 1200 inverter -- I don't
think Canadian Tire sells them any more, it looks like this:

http://answers.canadiantire.ca/answers/9045/product/0111849P/questions.htm

... and my biiiig marine battery - the inverter + battery + battery charger
forms a kind of home-brew online uninterruptible power supply; the battery
is about 55 amp-hours.

My main complaint with it is that the Eliminator series is set to shut off
when the input voltage goes below (as I recall) 11.0 volts, so you can't
really get all the amps out of the battery.  However, you can see that it
does have a little display on it; it can either display
* input voltage
* output watts
* output voltage

It displays W in 10W increments.  

While doing the POST, it read 30W; while sitting at the GRUB screen, 20W;
while booting, 50W; and while idling with the OS up with no CPU load, back
to 20W.

Next week I may borrow a friend's Kill-A-Watt to get a more precise
measurement, and run something on it to put it under load during the test -
maybe compile gcc or something.

--
Daniel MacKay
Halifax, Nova Scotia, Canada



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