Learn about the main energy saving methods of win7

Energy saving, environmental protection, and one thing that people on earth are emphasizing. Now Windows7 has also released a white paper "Windows 7 Power Management", which details how the power management technology of Windows 7 reduces consumption. If you want to make your computer more energy efficient, this white paper will give you the answer. However, the 14-page text will not be read in a while. The following small series select some of the main means of energy saving in win7, let's get to know it.

1. Energy consumption of idle resources When a computer is started, it will not be in full load operation, so there will be a lot of idle time, so the power consumption in idle time becomes a power management. Important technology. 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. Bluetooth device power consumption improvements When Windows 7 detects that Bluetooth devices are in a low-power state, they are temporarily turned off, that is, "selective suspend".

4. Network Device Power Improvements The compatibility of the wireless network controller's low power mode in Windows 7 has been enhanced and will only be enabled if the wireless AP device supports low power mode. 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. It will first detect if the wireless AP supports this mode before entering the low power mode.

5. Enhanced Processor Power Management Windows 7 integrates the latest power management technology that allows Windows 7 to dynamically adjust CPU performance based on current load conditions and performance requirements.

6. 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.

7. 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.

8. 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 to obtain energy-saving effects. 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.

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: Let the CPU maintain low power mode without affecting playback performance. Improve the power consumption of desktop window manager and GPU by changing the architecture. Intelligent data buffer can reduce the speed of optical drive

Windows7 has made the above 9 improvements in power management, which is more energy efficient than previous systems. In addition to these improvements, we can use power management diagnostics to find problems that may affect power efficiency.