[kwlug-disc] [OT] linux server power
Insurance Squared Inc.
gcooke at insurancesquared.com
Sat Jan 29 08:37:54 EST 2011
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 kilowatt hours.
> 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 hours.
> At 10c/KWh that's $0.51/month.
> The savings of 93W over 24x7 would be 93W * 24H * 30.5 days / 1000 =
> 68.1 kilowatt hours.
> 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 years.
> 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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