[Novalug] powering computers

Igor Birman igor_birman@yahoo.com
Fri Jan 22 09:50:39 EST 2016


That was a GM article, try this one:
https://gigaom.com/2009/04/01/a-key-to-googles-data-center-efficiency-one-backup-battery-per-server/

Igor 

    On Friday, January 22, 2016 9:48 AM, Igor Birman <igor_birman@yahoo.com> wrote:
 

 That is exactly what Google does in their data centers, each machine gets a car battery, they find this is more efficient and reliable than a giant UPS for the data center:
http://www.greendatacenternews.org/articles/815551/car-batteries-powering-up-in-data-centers-by-peter/

Igor 

    On Friday, January 22, 2016 9:28 AM, pereira via Novalug <novalug@firemountain.net> wrote:
 

 Hi List,

an earlier discussion about a computer powering on and off erratically, 
perhaps
due to an old power supply (PS) or a voltage regulator (VR), mentioned 
that modern
motherboards (MB) use mostly +12 V from the PS the computers; a VR 
circuit on the
MB then brings this down to the right voltage, + 5 V or +3.3 V or maybe 
some other
voltage for future chips. If this is indeed so, would it not be 
possible, and perhaps
preferable, to run the computer of something like a car battery rather 
than a PS?

One of my uninterruptible power supplies (UPSs) had 2 12 V batteries in 
series,
so 24 V direct current (DC). The electronics in it brings it up to 110 V 
alternating
current (AC), after which the computer's PS brings it back down to 12 V 
DC and
5 V DC, which may not be actually used. Going up and down in voltage a 
few times
seems really dumb.

Am I right?

Nino



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