[kwlug-disc] [OT] linux server power
rarsa at yahoo.com
Sat Jan 29 20:35:10 EST 2011
I plugged my watt-o-meter to my Pentium III 400 Mhz.
After 12 hours the cost at $0.062 was 4 cents. Extrapolating: $30 / year
The average power consumption was 70 Watts
Using a 7 watts computer the cost would be $3.00
If it costs $100, it pays back in less than 4 years.
I found these plug computers (based on the sheevaplug design). These are full
blown micro servers I'm seriously considering.
Software, Hardware and Practices
An eclectic collection of random thoughts
----- Original Message ----
From: Insurance Squared Inc. <gcooke at insurancesquared.com>
To: KWLUG discussion <kwlug-disc at kwlug.org>
Sent: Sat, January 29, 2011 8:37:54 AM
Subject: Re: [kwlug-disc] [OT] linux server power
There are other factors.
1) if I use something quiet and fanless, I can relocate out of the furnace
room. That's a plus.
2) Deduct the resale value of a 3.06 ghz tower server and a dual xeon w 8gigs HP
workstation (maybe $100total?) and payback period could be a year or two.
3) The machines are older, they're not forever. I'll have to buy new hardware
before 5 years is up. So we're really looking at moving a purchase ahead 2-3
years rather than a brand new purchase.
The 10c per KWH was what the electrician used. And if his high estimate of
$30/month is reasonable, and we drop down to $7 a month electrical cost with
lower hardware, and I sell the old equipment, payback is in less than a year.
How can I afford NOT to buy new computers? :).
On 29/01/11 08:24 AM, John Johnson wrote:
> On 2011-01-29 06:57, Raul Suarez wrote:
>> Coincidentally I was reading about trixbox and found this
> In context, the power consumption of the "fanless" trixbox PBX (which can run
>under Linux) is:
> <1W at standby
> 6W at low CPU load
> <7W at 1080p H.264 playback
> 8W at full CPU load
> Assuming a VoIP server at approx. 100W and 7W for the trixbox VoIP server we
>have a savings of 93W.
> per John Van O
> a 100W load running 24x7 would use 100W * 24H * 30.5 days / 1000 = 73.2
> At 10c/KWh that's $7.32/month. (note: the 10c/kWH is an estimate and could be
>on the high side)
> substituting 7W for 100W we have:
> a 7W load running 24x7 would use 100W * 24H * 30.5 days / 1000 = 5.1 kilowatt
> At 10c/KWh that's $0.51/month.
> The savings of 93W over 24x7 would be 93W * 24H * 30.5 days / 1000 = 68.1
> At 10c/KWh that's $6.81/month.
> Nothing to sneeze at.
> Except when one looks at the payback.
> Assuming a cost of $400 ($US == $CDN) the payback is 58 months or almost 5
> One would likely need another reason to justify the expense, e.g. downtime,
>reliability, size, noise, etc.
> Or just simply the geek factor.
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