Velocity Reviews > computer power consumption

# computer power consumption

T.N.O. - Dave.net.nz
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 01-15-2004
Am I right to assume that my 400W PSU in my PC and my 17" monitor would
use(at most) 500W?

so 1/2 a kwh

we get charged 11c per kwh, so 5.5c per hour?
(well actually its 11.09c)

so thats \$1.32 per day, or \$40 per month.(close enough to)

now this is assuming that it runs at 100% power usage all the time, any
idea what your typical PC would use?

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Mainlander
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 01-16-2004
In article <XDCNb.13024\$(E-Mail Removed)>,
http://www.velocityreviews.com/forums/(E-Mail Removed) says...
> Am I right to assume that my 400W PSU in my PC and my 17" monitor would
> use(at most) 500W?
>
> so 1/2 a kwh

500 watts will use half a kWh per hour.

>
> we get charged 11c per kwh, so 5.5c per hour?
> (well actually its 11.09c)
>
> so thats \$1.32 per day, or \$40 per month.(close enough to)
>
> now this is assuming that it runs at 100% power usage all the time, any
> idea what your typical PC would use?

If the household can stand the disruption, turn off everything else in
the house, then time the revolutions of your electricity meter.

Multiply the time for one revolution by the revs/kwH figure written on
the front, giving you the number of seconds to use one unit of power.

Divide 3600 by this number, which gives you the actual wattage of the
appliances. (3600 = the number of seconds in an hour)

This is an interesting point. I think my PC uses somewhat less power, but
enough for me to consider turning it off when I am not at home.

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T.N.O. - Dave.net.nz
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 01-16-2004
Mainlander wrote:
>>so thats \$1.32 per day, or \$40 per month.(close enough to)
>>now this is assuming that it runs at 100% power usage all the time, any
>>idea what your typical PC would use?

> If the household can stand the disruption, turn off everything else in
> the house, then time the revolutions of your electricity meter.
> This is an interesting point. I think my PC uses somewhat less power, but
> enough for me to consider turning it off when I am not at home.

yeah, the reason it came up in the household this month is that I have
"got fast net, must leave on to use it"... and we got a ~\$100
bill(around \$20 more than usual)

Unfortunately, I think the woman may be right, and the cause of the
abnormally high bill, will be Beast(my pc's name)... I may have to use
the laptop to download stuff(~70W total power use according to the specs).
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T.N.O. - Dave.net.nz
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 01-16-2004
colinco wrote:
>>Unfortunately, I think the woman may be right, and the cause of the
>>abnormally high bill, will be Beast(my pc's name)... I may have to use
>>the laptop to download stuff(~70W total power use according to the specs).

> that much the laptop will prob run out of disk

The screen isn't normally on, but I figured I'd work it out, and then
work it out without it... Don't spread it around, but I enjoy maths

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colinco
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 01-16-2004
In article <MTFNb.13190\$(E-Mail Removed)>,
(E-Mail Removed) says...
> yeah, the reason it came up in the household this month is that I have
> "got fast net, must leave on to use it"... and we got a ~\$100
> bill(around \$20 more than usual)
>
> Unfortunately, I think the woman may be right, and the cause of the
> abnormally high bill, will be Beast(my pc's name)... I may have to use
> the laptop to download stuff(~70W total power use according to the specs).
>

that much the laptop will prob run out of disk

Mainlander
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 01-16-2004
In article <XDCNb.13024\$(E-Mail Removed)>,
(E-Mail Removed) says...
> Am I right to assume that my 400W PSU in my PC and my 17" monitor would
> use(at most) 500W?

At most, it depends on how much power the computer is actually using.

My calculations:

2 PCs and a screen: 215 W
with the computer running normally and the HDD spinning, no other
peripherals in use. Pentium 1 / MMX CPUs in both machines with standard
CPU fans.

1 PC and screen running: 170 W

1 PC and screen at standby: 108 W

These figures also include the household power consumption of a TV, VCR
and stereo on standby, and three working clock radios with the radio off.
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EMB
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 01-16-2004

"Mainlander" <*@*.*> wrote in message
news:(E-Mail Removed). nz...
>> My calculations:

>
> 2 PCs and a screen: 215 W
> with the computer running normally and the HDD spinning, no other
> peripherals in use. Pentium 1 / MMX CPUs in both machines with standard
> CPU fans.
>
> 1 PC and screen running: 170 W
>
> 1 PC and screen at standby: 108 W
>
> These figures also include the household power consumption of a TV, VCR
> and stereo on standby, and three working clock radios with the radio off.

However older electricity meters do not detect low current draws well - when
our meter malfunctioned and was replaced the power board guy said our bill
would be higher now as the old meter probably wouldn't have detected loads
under 150 watts or so. He was right - the bill went up by about \$15 per
month!

EMB

Mainlander
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 01-16-2004
In article <bu7f4l\$88b\$(E-Mail Removed)>, (E-Mail Removed) says...
>
> "Mainlander" <*@*.*> wrote in message
> news:(E-Mail Removed). nz...
> >> My calculations:

> >
> > 2 PCs and a screen: 215 W
> > with the computer running normally and the HDD spinning, no other
> > peripherals in use. Pentium 1 / MMX CPUs in both machines with standard
> > CPU fans.
> >
> > 1 PC and screen running: 170 W
> >
> > 1 PC and screen at standby: 108 W
> >
> > These figures also include the household power consumption of a TV, VCR
> > and stereo on standby, and three working clock radios with the radio off.

>
> However older electricity meters do not detect low current draws well - when
> our meter malfunctioned and was replaced the power board guy said our bill
> would be higher now as the old meter probably wouldn't have detected loads
> under 150 watts or so. He was right - the bill went up by about \$15 per
> month!

The meter I have is 10 years old and was installed last year when the
underground lines were replaced.

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Jay
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 01-16-2004
Mainlander wrote:

> In article <XDCNb.13024\$(E-Mail Removed)>,
> (E-Mail Removed) says...
>> Am I right to assume that my 400W PSU in my PC and my 17" monitor would
>> use(at most) 500W?
>>
>> so 1/2 a kwh

>
> 500 watts will use half a kWh per hour.

Are you sure?
Haven't you argued before that 'k' means 1024?

T.N.O. - Dave.net.nz
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 01-16-2004
Jay wrote:

> Mainlander wrote:
>
>
>>In article <XDCNb.13024\$(E-Mail Removed)>,
>>(E-Mail Removed) says...
>>
>>>Am I right to assume that my 400W PSU in my PC and my 17" monitor would
>>>use(at most) 500W?
>>>
>>>so 1/2 a kwh

>>
>>500 watts will use half a kWh per hour.

>
>
> Are you sure?
> Haven't you argued before that 'k' means 1024?

not when referring to power... anyway, for the 1024 versions, people
really should use the correct iso stanard abreiviations for them... they
are...
kibi = ki
mibi = mi
gibi = gi

I dont know if there is anything above that... I couldn't find it anyway.

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