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Re: Shut down or leave on?

From: Adam Hardy <adam.ant(at)cyberspaceroad.com>
Date: Sat Sep 01 2007 - 15:46:13 EDT

ndemou@gmail.com on 29/08/07 16:24, wrote:
> On 8/28/07, Richard Carter <carter.r.a.l@gmail.com> wrote:

>> [...]
>> 3) I thought it was a waste of electricity, and money, to have a machine
>> running that wasn't being used.

>
> it is but if you find a lot of other reasons to keep it alive then you
> probably want to check ways to minimize power consumption. Automatic
> adjustment of CPU frequency, automaticaly powering off HDs and
> monitor when not in use, funs wich adjust RPM according to temperature
> etc

My previous server used 100 Watts on average.

If left on 24/7, that's 61,320 hours a year, or 6,132,000 Watt-hours or 6,132 kWh.

According to the stats, every kWh produced in the UK causes 0.5 kg of carbon dioxide emissions. So with that machine I caused 3,070 kg of CO2 emissions, or 3 metric tonnes per year.

To put it in context, the UK produces 7 to 15 metric tonnes of CO2 per person per year. In the USA, it's over 15 tonnes.

So with that one PC I produced maybe a third of my carbon footprint.

My new server (uptime 28 days) apparently only consumes 35W - I haven't put the meter on it yet. So it's down to a tonne of CO2 a year.

If I divide that between my household of 4 who all use it, then it's probably acceptable. Plus of course I should switch to a power supplier that provides energy from renewable sources.

Do you need help?

Also, if powering down and booting up causes hardware damage, the environmental cost of the replacement is a factor - avoiding pollution with the old and energy to manufacture the new - although so far on the thread the main opinion seems to be that new harddrives don't suffer too much this way and I don't think it was conclusive argued that it causes damage to chips and boards.

Regards
Adam

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Received on Sat Sep 1 15:46:47 2007

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