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Re: How much?
- To: ukha_d@xxxxxxx
- Subject: Re: How much?
- From: Nigel Orr <nigel.orr@xxxxxxx>
- Date: Thu, 16 Dec 1999 09:35:41 +0000
- Delivered-to: rich@xxxxxxx
- Delivered-to: listsaver-egroups-ukha_d@xxxxxxx
- Mailing-list: contact ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
At 22:04 15/12/99 -0000, you wrote:
>Does anyone have any info on how much it costs, per day to leave a PC
(not
>the monitor) on 24/7?
Typical power supplies are about 200W-300W, so probably about 350W absolute
peak with a bundle of drives running continuously. I would expect, from
measuring the power drawn by our machines in the past, that it would
average around 100W or less in typical use, and a bit less if the drives
spin down, or there are other power saving measures. Probably 50W over a
week's measurements? It depends critically on the processor- if you are
running a 486 or Pentium under 100MHz, the power will be lower than
something running at 600MHz or more!
Guesstimating electricity costs at 7p/kWh, that would be about 9p per day.
Bear in mind that the power is almost all given off as heat, so if you want
to be fair about it, the 100W will mean less power required from your
heaters...
I tend to leave my linux machines up continuously (except when they are in
pieces on the floor ;-) ). Windows machines are best rebooted occasionally
to recover any 'leaked' resources or memory, so might as well be switched
off when not in use for a day or two.
Nigel
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