We noticed that some of the links in our original blog post from over a year ago needed updating.
When a PC is shut down at the end of the day, the monitor isn’t necessarily turned off too.
Ever wonder how much this may be costing you?
There are 4 power management options that a monitor can use.
|Mode||Power||Approximate Recovery Time|
|Standby||< 80%||1 Second|
|Suspend||< 30W||5 Seconds|
|Active Off||< 8 W||20 Seconds|
Using the example of a Dell 1908FP-BLK Flat Panel we can see that in the ON mode, it uses 60W maximum, but 30W is typical. However, in the Active-off mode it uses less than 2W. If we assume that a PC is turned off for at least 14 hours a day then we can calculate the power savings we will have by setting the Active-off mode for this monitor.
In 2012, the average cost per kWh in the commercial sector was 10.12¢ according to the Energy Information Administration.
30W – 2W = 28W
28W * 14 hours = 392W in savings or ~3.96¢ per monitor/day or $14.47/monitor/year
If you multiply this amount by the number of monitors in your environment you are talking about some serious dollar amounts.
5,000 monitors = $72,398.48
10,000 monitors = $144,796.96
100,000 monitors = $1,447,969.60
More savings can also be realized if modes other than “ON” are used throughout the day.
Energy Star has a Low Carbon IT Campaign and it lists power-managing computers as the #1 way to reduce IT energy costs. http://www.energystar.gov/index.cfm?c=power_mgt.pr_power_mgt_low_carbon
According to Energy Star, “The business case for activating system standby and/or hibernate settings is compelling.” http://www.energystar.gov/index.cfm?c=power_mgt.pr_power_mgt_enterprises
Do you know what power management options are available on your monitors?
Monitor Information Reporting will tell you what’s available!
Use the Energy Star calculator to help determine cost savings: Estimate your savings using our online savings calculator
For more information about monitor power management options: http://en.wikipedia.org/wiki/VESA_Display_Power_Management_Signaling