On Sat, 2007-04-14 at 01:38 -0400, Stephen Gregory wrote:
> I borrowed a decent ammeter from work to measure the power usage of
> some computers.
I borrowed a kill-a-watt meter from the library and did some
measurements at home. With that you can measure power usage over time
and get a better longterm value even for on-off things like the fridge.
I then took my hydro bills, looked at how many KWh I used and divided
that with how many $$ I paid and came up with that with all different
fees, taxes etc 1KWh cost me about 12cents.
A sample of what I measured:
What
Kw/h
$/ Mth
Dell D2026T monitor – on
0.11
$9.64
Dell D2026T monitor –
PowerSave
0.003
$0.26
Sun GDM5410 Mon on
0.11
$9.37
Sun GDM5410 Mon
PowerSave
0.004
$0.52
Box Freezer
0.05
$4.16
Fridge (11 h overnight)
0.09
$7.73
Picard, AMD 3000+ – max
load
0.13
$11.40
Picard power off
(standby)
0.01
$0.43
Picard Bios – no disk
0.09
$8.06
added hda
0.1
$8.50
added hdc
0.11
$9.19
added sata1
0.12
$10.14
added sata2
0.13
$11.10
Kira, P4 3GHz, 3 disks
0.14
$12.26
sisko, 2x Opteron 246,
4x250G disk, 4x512Mb
0.23
$19.83
NetApp Fibrechannel
Disks, 1ps, 3disks
0.1
$8.24
NetApp Fibrechannel
Disks, 2ps, 3disks
0.11
$9.19
NetApp Fibrechannel
Disks, 2ps, 7disks
0.14
$11.82
12Disk fc with 8 disks
0.26
$22.81
HP LJ 4000N, power save
0.02
$1.38
Dell PE6650 with 4
Drives
0.26
$22.32
Compaq PL1850R
0.13
$11.13
I now bought a kill-a-watt from
http://www.thinkgeek.com/gadgets/electronic/7657/ and keep on measuring
more things.
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