Sorry Trevor, but that is for a DIRECT current circuit.

We are talking about the current draw on the
input to the computer -- the ALTERNATING current (AC).

I finally had some time to look up the formula....

As you can see, AC circuit analysis is much more
complex than DC circuits.

Watttage = Voltage x Current x cosign of theta

where theta is the phase shift between the voltage
sine wave the leading OR lagging current sine wave.

The phase shift is created by the combination of the
inductance, resistance, and capacitance of the load (the PC).

Once upon a time in a galaxy far, far, away, I was an
Electrical Engineer.  Then I ran into a Burrough's 3000 system
running SNOBOL via card decks and I wuz hooked....

Jim Meagher
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Micro Solutions Consulting    Member of the HTML Writers Guild & the
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> -----Original Message-----
> From: PCBUILD - PC Hardware discussion List
> [mailto:[log in to unmask]]On Behalf Of Trevor Gibbs
> Hi Jim,
>
> Wattage is easy, it's simply Voltage multiplied by current so 110 volts
> x 2 amps =220 watts or roughly 1 kilowatt hour for every 4.5 hours your
> machine is on. This does not count the Monitor power consumption!
>
> Hope this helps
>
>
> Trevor Gibbs
>