----- Original Message -----
From: "Thomas Ribbrock" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, June 15, 2000 8:27 AM
Subject: Re: Leaving the computer on
> On Thu, Jun 15, 2000 at 07:16:03AM -0700, CH wrote:
> [...]
> > Unless you have a computer with a huge power supply above 250w. I have
350w
> > and my system uses more power than my monitor.
>
> Ahem... That statement is not quite correct. The power rating of the
> supply has nothing to do with the *actual* consumption (thank be to
> $DEITY, otherwise the whole thing would be majorly unefficient...). If
> you have two PCs with the exact same hardware and under the same load
> conditions, but one with a 150W supply and the other with a 250W supply,
> both systems should use (more or less) the same amount of energy. If
> not, one of the supplies is broken...
> The ratings you get on the PC power supplies are the maximum rating on
> what they can deliver, i.e. a 300W supply will be able to drive 300W
> worth of equipment. However, you would still have to pay attention that
> none of the different voltage supplies (+5V, +12V, -12V) is overloaded,
> as the power rating is over all voltages.
> The max. *input* consumption will be even higher than the 300W in this
> case, as there are always losses within the supply.
That's true. With larger parts in the supply may take a few watts more than
smaller parts. I know I am not using the full wattage since how the power
supply is designed to use less power to make less power. Similar applies to
a standard transformer since if you short the secondary side you will notice
major current draw on the primary side. I just know that I am using alot
since my 250W was getting real hot from all the drives I slap into my
machine and 350W handles it perfectly even if I am only using about 75% of
350W. I wonder if just adding a dual processor will bring it over 300W? At
least I have some reserve.:)
CH
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