some ruminations on saving money, power, etc.

[Jack Coats]

Then there is the secondary power costs.  Cost to cool/heat.
It is a heat source, so it compensates for some heat that would
be required from elsewhere (pretty minimal), but if you have
to run air conditioning and have a SERR of 10, then your $60/year
costs you 10% more during the cooling season. (Say 6 months
so that is $3 more)

Also calculate in any network infrastructure on the power considerations,
like switches, routers, cable boxes, oh yes, UPSes (they are almost
REQUIRED where I live... and they are not very energy efficient, but
newer ones are better than older ones on their power conversion ratios )

><> ... Jack
Whatever you do, work at it with all your heart... Colossians 3:23



On Wed, Sep 29, 2010 at 9:01 AM, Dan Ritter <dsr-mzpnVDyJpH4k7aNtvndDlA at public.gmane.org> wrote:
> At home, I currently run:
>
> - my main server
> - my desktop, which never sleeps
> - my wife's laptop, which never sleeps
> - my laptop, which is almost always sleeping
> - the Myth box, which doesn't sleep
> - the kids' machine, which is off when they aren't using it
>
> All of these run Linux, mostly Debian Lenny. It would be nice if
> my desktop would sleep (it wakes up immediately, as far as I can
> tell) and my wife's laptop would sleep (it does, but gets
> unstable afterwards -- maybe this will improve in Squeeze).
>
> The server can't and shouldn't sleep, but maybe I could replace
> it with a lower-power part. Currently, it's an Athlon 3500
> (single core) with 1.5GB RAM, a 2 disk RAID mirror and an
> external USB disk for backup.
>
> It looks like an Atom D510 is roughly comparable to the Athlon
> in performance, and would reduce power usage about 50W, counting
> the required new motherboard and RAM.
>
> On the other hand, that's about $150 in parts, and 50W * 24h *
> 30d *12m /1000 is 432KWh per year, which at 14c/KWh is $60. So
> it would take over two years to repay. Meanwhile, there's no
> obvious reason that the Athlon won't continue to function for
> another year or two.
>
> --
> http://tao.merseine.nu/~dsr/eula.html is hereby incorporated by reference.
> You can't defend freedom by getting rid of it.
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