Sleep mode saves even more than we thought!

Tuesday, February 23rd, 2010 12:23 pm

Meghan Smith, a student in Prof. Nat Fortune’s PHY100 course “Solar Energy and Sustainability,” recently compared the power draw of her laptop with and without having her power-management “sleep” settings configured to:

  • Turn off the display after several minutes of inactivity, and
  • Put the hard drive into standby mode after 30-60 minutes of inactivity

She measured a savings of 1.16 kWh per day, which translates to…

1.16 kWh/day * 250 days/year * 2600 students = 754,000 kWh. That’s worth more than $120,000!

For instructions on setting your own computer display to automatically switch to sleep mode (instead of a power-wasting screen saver) after a period of inactivity, see:

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