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 The Facts:
111 Watts + Accessing Hard Drive
96 Watts Desktop Mode – Idle
92 Watts "Blank Screen" Screen Saver Mode
36 Watts CPU Idle and Monitor configured for Energy Star Power Down
Typical Dell Optiplex Series CPU
with 14" Trinitron Monitor
Cost of Leaving Computer On Continually:
If one computer is left on 5 days a week in the Desktop Mode cited above, it will draw 96 Watts. Let’s say that this computer is not used from 4 PM in the afternoon until 8 AM in the morning. This would be a total of 16 hours the machine is on and not in use. We pay the Utility Company approximately $ .06 per KWh which equates to $ .96 a day...not bad? If one computer is left on in every classroom in the district, the cost is now $14,400 per day. In a typical monthly billing cycle, this would cost the district an additional $403,200 per month. Now consider that the buildings are in use for instruction approximately 10 months a year...the impact annually is $4,032,000.
TURNING YOUR COMPUTER OFF EVERY NIGHT DOES MAKE A DIFFERENCE
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