Power Management:
A power plan (formerly known as a power scheme in earlier versions of Windows) is a collection of hardware and system settings that manages how your computer uses and conserves power. You can use power plans to save energy, maximize system performance, or balance energy conservation with performance.
Windows 7 includes three default power plans as follows:
Balanced - Offers full performance when you need it and saves power during periods of inactivity.
Power saver - Saves power by reducing system performance. This plan can help mobile PC users get the most from a single battery charge.
High performance - Maximizes system performance and responsiveness. Mobile PC users might notice that their battery doesn’t last as long when using this plan.
To modify one of the existing plans follow the steps below:
1.click the Start button, then Control Panel, and then System and Security. Next click Power Options.
2.Click Change plan settings next to the plan that you want to change.
1. Choose the display and sleep settings that you want to use when your computer is running on battery and when it’s plugged in.
2. To change additional power settings, click Change advanced power settings. This will allow you to change settings for specific hardware.
You can also create a new plan following these steps:
1. Click the Start button, then Control Panel, and then System and Security. Next click Power Options.
2. Click Create a plan in the left pane.
3. Select the plan that is the closest to the type of plan that you want to create. Type a name for the plan and then click Next.
4. Choose the display and sleep settings that you want to use when your computer is running on battery and when it’s plugged in and then click Create.
To further configure your new plan, follow the steps above for modifying an existing plan.
Sleep and Hibernate:
Sleep is a power-saving state that allows a computer to quickly resume full-power operation (typically within several seconds) when you want to start working again. Putting your computer into the sleep state is like pausing a DVD player: The computer immediately stops what it’s doing and is ready to start again when you want to resume working.
Hibernation is a power-saving state designed primarily for laptops. While sleep puts your work and settings in memory and draws a small amount of power, hibernation puts your open documents and programs on your hard disk, and then turns off your computer. Of all the power-saving states in Windows, hibernation uses the least amount of power. On a laptop, use hibernation when you know that you won’t use your laptop for an extended period and won’t have an opportunity to charge the battery during that time.
Hybrid sleep is designed primarily for desktop computers. Hybrid sleep is a combination of sleep and hibernate—it puts any open documents and programs in memory and on your hard disk, and then puts your computer into a low-power state so that you can quickly resume your work. That way, if a power failure occurs, Windows can restore your work from your hard disk. When hybrid sleep is turned on, putting your computer into sleep automatically puts your computer into hybrid sleep. Hybrid sleep is typically turned on by default.
These settings can also be configured from the Power Options control panel.
Exporting Power Plans:
Powercfg.exe is a command line utility that can perform most of the power configuration tasks covered above. It can also do a couple of things that can't be done through the GUI such as exporting a power plan to be migrated to another computer. To do this, follow these steps:
1.At an elevated command prompt, type powercfg.exe –list. Record the GUID assigned to the plan you wish to export as you will need it later
2. Create a directory to save the exported configuration. In this example, we are using C:\power. Change into this directory by typing cd C:\power.
3. Enter the command powercfg.exe –export [filename].pow [GUID], where [filename] is the name of the exported file to be saved and [GUID] is the GUID of the power plan you are trying to export
In this case, the file power.pow was saved to our C:\power folder. This file can be migrated to another computer and imported using the following command: powercfg.exe -import [path to file]\power.pow
A power plan (formerly known as a power scheme in earlier versions of Windows) is a collection of hardware and system settings that manages how your computer uses and conserves power. You can use power plans to save energy, maximize system performance, or balance energy conservation with performance.
Windows 7 includes three default power plans as follows:
Balanced - Offers full performance when you need it and saves power during periods of inactivity.
Power saver - Saves power by reducing system performance. This plan can help mobile PC users get the most from a single battery charge.
High performance - Maximizes system performance and responsiveness. Mobile PC users might notice that their battery doesn’t last as long when using this plan.
To modify one of the existing plans follow the steps below:
1.click the Start button, then Control Panel, and then System and Security. Next click Power Options.
2.Click Change plan settings next to the plan that you want to change.
1. Choose the display and sleep settings that you want to use when your computer is running on battery and when it’s plugged in.
2. To change additional power settings, click Change advanced power settings. This will allow you to change settings for specific hardware.
You can also create a new plan following these steps:
1. Click the Start button, then Control Panel, and then System and Security. Next click Power Options.
2. Click Create a plan in the left pane.
3. Select the plan that is the closest to the type of plan that you want to create. Type a name for the plan and then click Next.
4. Choose the display and sleep settings that you want to use when your computer is running on battery and when it’s plugged in and then click Create.
To further configure your new plan, follow the steps above for modifying an existing plan.
Sleep and Hibernate:
Sleep is a power-saving state that allows a computer to quickly resume full-power operation (typically within several seconds) when you want to start working again. Putting your computer into the sleep state is like pausing a DVD player: The computer immediately stops what it’s doing and is ready to start again when you want to resume working.
Hibernation is a power-saving state designed primarily for laptops. While sleep puts your work and settings in memory and draws a small amount of power, hibernation puts your open documents and programs on your hard disk, and then turns off your computer. Of all the power-saving states in Windows, hibernation uses the least amount of power. On a laptop, use hibernation when you know that you won’t use your laptop for an extended period and won’t have an opportunity to charge the battery during that time.
Hybrid sleep is designed primarily for desktop computers. Hybrid sleep is a combination of sleep and hibernate—it puts any open documents and programs in memory and on your hard disk, and then puts your computer into a low-power state so that you can quickly resume your work. That way, if a power failure occurs, Windows can restore your work from your hard disk. When hybrid sleep is turned on, putting your computer into sleep automatically puts your computer into hybrid sleep. Hybrid sleep is typically turned on by default.
These settings can also be configured from the Power Options control panel.
Exporting Power Plans:
Powercfg.exe is a command line utility that can perform most of the power configuration tasks covered above. It can also do a couple of things that can't be done through the GUI such as exporting a power plan to be migrated to another computer. To do this, follow these steps:
1.At an elevated command prompt, type powercfg.exe –list. Record the GUID assigned to the plan you wish to export as you will need it later
2. Create a directory to save the exported configuration. In this example, we are using C:\power. Change into this directory by typing cd C:\power.
3. Enter the command powercfg.exe –export [filename].pow [GUID], where [filename] is the name of the exported file to be saved and [GUID] is the GUID of the power plan you are trying to export
In this case, the file power.pow was saved to our C:\power folder. This file can be migrated to another computer and imported using the following command: powercfg.exe -import [path to file]\power.pow
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