1, energy consumption of idle resources
When a computer starts, it will not always 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 Win7, 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 sections. 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, enhanced processor power management
Win7 integrates the latest power management technology, which enables Win7 to dynamically adjust CPU performance based on current load conditions and performance requirements.
3, start the service by triggering
Usually the system service will start together when the system starts, and then reside in the background waiting to be called. In Win7, 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.
4, adaptive display brightness adjustment
Microsoft said that usually no operation in 10-15 minutes, the display will automatically shut down. 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
Win7 will support Intel's low-power HD audio specification, which allows the codec to enter a very low power state. Win7 also supports selective suspend technology to turn off devices that are idle, such as USB devices such as microphones and cameras.
6, Bluetooth device power consumption improvement
When Win7 detects that Bluetooth devices are in a low-power state, they will be temporarily turned off, that is, "selective suspend".
7, timer integration
The current processor to achieve energy-saving purposes by using the gap time of the 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, Win7 will reduce the frequency of non-critical daemons when the notebook is using a battery.
8, network device power consumption improvement
Win7 compatibility for wireless network controller low power mode has been enhanced, only enabled when 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 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 also turned its attention to specific applications, including search, browsing without networking and small games. The following is part of the optimization scheme for DVD playback: let the CPU maintain a low power mode without affecting the playback performance, and improve the power consumption of the desktop window manager and GPU by changing the architecture. The intelligent data cache can reduce the speed of the optical drive.