Quote:
Originally Posted by pdog
Bandwidth is not the main cost, it's running the CPUs at 100% for most of the day. A modern CPU at idle might consume 60 watts but at 100% take 160 watts. That 100w difference times 5000 machines makes for a big jump in the electricity bill. At 10c per kW/hr, that's $50/hr. If they were running 20 hrs a day, he was costing the district $1000/day.
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I don't know how they work it so this is just speculation, but it makes an even larger difference if the computers were running all night vs. being shut down or hibernating when students aren't there.