The tools on the other hand are similar regardless of the motivation of the single user. A computer power management software like Edison can aid the user in the process. Edison basically allows a user to set power saving profiles for work and off-work hours on a computer system.

Three parameters can be defined for both work time and non-work time that have been taken directly from the Power Options of the Windows Control Panel

The user can define the time in minutes to turn off the display, power down the connected hard drives and to suspend the computer. Edison will display an estimated annual saving which is divided into money, energy and CO2. The problem with those figures is that they calculate the savings by taking the average PC usage per year into account. Users who work more or less will see different results as will users who work with a high-end computer system or low end system.

The figures can therefor only be seen as a guideline. It is possible to change the price per kWh but not the average work time per day which is rather unfortunate.

A slider is available on top that can be used to configure the program. Experienced users can also enter the values manually.

Edison is an interesting application as it visualizes the abstract power saving concept. It might make more sense for most users to simply adjust the power saving settings in the Control Panel.

Users who are serious about saving energy might want to invest money in an energy monitor that is connected between power source and computer. They might also be interested in the articles: Saving Energy With All Off, Create Video Card Profiles To Save Power And Reduce Noise and 80 Plus Power Supply Units.

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