Hello Anthony,

Thursday, January 13, 2000, 7:56:15 PM, you wrote:

PA> Here at work I have an IBM 300PL (P2-300MHz, CD-ROM, sound card) and a 17
PA> inch IBM G54 colour monitor. This morning I measured the current being drawn
PA> by the computer and monitor separately. The results are (assuming a power
PA> factor of 1):
PA> Computer: Power = 117 volts  * 0.7 amps = 81.9 watts
PA> Monitor Power = 117 volts * 1.1 amps = 128.7 watts.
PA> My computer is on for 8.5 hours per day. The cost of electricity here is
PA> 0.0835 $/kwh.
PA> Rather than turning this computer and monitor off, if I left it on for 24
PA> hrs per day the additional yearly cost would be :
PA> Yearly Cost = (24-8.5)h/day * 365 days/year * (128.7 + 81.8)/1000 kw *
PA> 0.0835 $/kwh = $99.44

Did you test your PC in on or sleep mode? If it was on, please switch
the PC into "sleep" mode and measure again. You would then provide
some precious numbers to give better answer to the question 'how much
does it cost to keep PC on?' since most PCs will eventually [after 20
min - 2 hrs] enter the sleep mode and the power savings vs. on mode
should be substantial.

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