Win7 notebook power saving method

On the Internet, I unwittingly saw Microsoft's "Power Management" white paper, which mainly explained how to reduce power consumption. Today, Ivy Encyclopedia will introduce you to Windows
7 how to save electricity.

(1) Energy consumption of idle resources

When a computer starts up, it will not be in full load operation, so there will be a lot of idle time, so it consumes power during idle time. Quantity has become an important technology in power management. In Windows 7, the power consumption during idle time is effectively improved. When a certain hardware does not work for a certain period of time, it will enter a low power state and achieve power saving. This technology is used in the CPU, hard disk, memory and network parts. For example, a CPU with a full power consumption of 35w consumes almost zero power when idle, and this alone can save a lot of power.

(2) Start the service by triggering

Usually the system service will start together when the system starts, and then stay in the background and wait for the call. In Windows 7, some system services are only started when triggered by some events, such as inserting a device or changing the IP. This reduces the number of long-running services in the background process.

(3) Enhanced Processor Power Management

Windows 7 integrates the latest power management technology that allows Windows 7 to dynamically adjust CPU based on current load conditions and performance requirements. performance. (4) Adaptive display brightness adjustment

Microsoft said that the display will automatically turn off if there is no operation for 10-15 minutes. However, there will be more short-term no-operations in actual use, and in order to save energy, the technology will reduce the brightness of the display. In addition, it can use some sensing devices to adjust the brightness of the display according to the brightness of the surrounding environment.

(5) Low-Power Audio

Windows 7 will support Intel's low-power HD audio specification, which allows the codec to enter a very low power state. Windows 7 also supports selective suspend technology to turn off devices that are idle, such as USB devices such as microphones and cameras. (6) Timer integration

At present, the processor achieves energy saving by utilizing the gap free time of processing instructions, but most energy-saving technologies require a certain length of idle time. Get energy saving results. This technology increases the idle time of the processor by allowing the Windows kernel to terminate at the same time and concentrate on a plurality of timers that are more dispersed.

In addition, Windows 7 reduces the frequency of non-critical daemons when the notebook is using a battery. Weaving dreams, good dreams

(7) Bluetooth device power consumption improvement

When Windows 7 detects that Bluetooth devices are in low power state, they will be temporarily turned off, that is, “ Selective hangs & rdquo;.

(8) Network device power consumption improvement

Windows 7 has enhanced the compatibility of wireless network controller low-power mode, only in wireless AP devices that support low-power mode. It will only be enabled in case. Vista can cause a sudden interruption in the wireless network connection because it cannot detect in advance whether it supports low-power mode. Windows 7 will prevent this from happening and will first detect if the wireless AP supports this mode before entering low power mode.

(9) Optimization of Typical Applications

In addition to the improvements listed above, Microsoft has turned its attention to specific applications, including search, browsing without networking and mini-games. The following is part of the optimization scheme for DVD playback:

· Keep the CPU in low power mode without affecting playback performance

· Improve desktop window management by changing the architecture Power consumption of GPU and GPU

· Intelligent data cache can reduce the speed of optical drive

The above is the improvement method of power management in Windows 7 shared by everyone. If you are Professionals can also use power management diagnostics to find out the cause of power consumption.