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Windows 7降低电能消耗的9大途径

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　　当一台计算机启动后,不会一直处在全负荷运行状态,因此会有很多空闲时间,所以空闲时间里耗电量就成为电源管理的一个重要技术。在Windows7里,空闲时的耗电量得到有效改善,当某个硬件一定时间不工作后就会进入低功耗状态已达到省电的目的.那Windows 7的电源管理技术是如何降低电能消耗

　　微软近期对外公布了一份标题为“Windows 7 Power Management”的14页白皮书，描述了Windows 7的电源管理技术是如何降低电能消耗。如果你想了解Windows 7究竟是如何省电的，这份白皮书会给你答案。如果你只想简单快速的了解一下，以下内容会告诉你Windows 7节能的主要途径。

　　1.空闲资源的能耗

　　当一台计算机启动后，不会一直处在全负荷运行状态，因此会有很多空闲时间，所以空闲时间里耗电量就成为电源管理的一个重要技术。在Windows7里，空闲时的耗电量得到有效改善，当某个硬件一定时间不工作后就会进入低功耗状态已达到省电的目的。包括CPU，硬盘，内存以及网络部分都采用了这种技术。比如，一块全功率运行功耗35w的CPU在空闲时功耗几乎为0，仅这一项就能节省不少电量。

　　2.通过触发来启动服务

　　通常系统服务都会在系统启动的时候一起启动，然后驻留在后台等待调用。在Windows7里，部分系统服务只有被一些事件触发后才会启动，如插入某个设备或者更改IP。这样可以减少后台进程里长时间运行的服务数量。

　　3.增强的处理器电源管理

　　Windows7里集成了最新的电源管理技术，该技术能够让Windows7根据当前负载情况和性能要求来动态的调节CPU性能。

　　4.自适应的显示亮度调节

　　微软表示，通常在10-15分钟时间里无操作的话，显示器会自动关闭。但在实际使用中会有更多短时间的无操作情况，为了更好地节能，该技术就会降低显示器的亮度。此外，它还可以利用一些传感设备，根据周围环境亮度来调整显示器亮度。

　　5.低功率音频

　　Windows7将会支持Intel的低功耗HD音频规范，它能让编解码器进入极低的功耗状态。Windows7还支持选择性挂起技术，将处于闲置状态的设备关闭，比如麦克风和摄像头这类USB设备。

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