如果您喜欢测试或只是检查您的计算机的硬件规格，您可能会惊讶地看到不同的操作系统提供有关您的硬件的冲突信息。为什么？今天的超级用户问答帖子有助于澄清读者的困惑。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

截图由Karan Raj Baruah（超级用户）提供。

问题

超级用户读者Daniel Sebestyen想知道为什么不同的操作系统提供了相互冲突的硬件规格信息：

I have a 3.6 GHz AMD FM2 A8-Series A8 5600K CPU (factory specs) and there is at least a 0.2 GHz difference between hardware reports on Windows and Linux.

The hardware was checked on the following operating systems:

• Windows 7 Ultimate x64 & x86 (both tests showed 3.4 GHz)
• Windows 8.1 Pro x64 & x86 (both tests showed 3.5 GHz)
• Ubuntu 14.10 & 14.10.1 x86 & x64 (tests displayed the correct amount, 3.6 GHz )
• Linux Mint 17 (x86 & x64, tests on Mate showed 3.55 GHz; x86 & x64 tests on Cinnamon displayed the correct amount, 3.6 GHz )

I know the CPU and my ASROCK motherboard have the ability to over-clock, but it is not enabled, so I do not think that will affect hardware tests.

Does anyone know if it is a sign of broken/damaged hardware or is it just differences between operating systems?

为什么丹尼尔在同一个硬件上得到不同的结果？

答案

超级用户贡献者Karan Raj Baruah和user201235为我们提供了答案。首先，Karan Raj Baruah：

I would recommend something like Speccy to get accurate specification information for your PC.

The Task Manager in Windows 8/8.1 always shows the present clock for your CPU. Sometimes when power saving modes are enabled (especially in laptops), the processor under-clocks on the go to save power and you will see a **aller number in the Task Manager.

然后是用户201235的答案：

Even without over-clocking or under-clocking, modern CPUs change their speed. They can enter turbo mode or power saving mode (and dip way way down). The difference in the exact background processes running is what accounts for the difference in reported speed.

In fact, many CPU monitoring programs let you observe the changes in speed in real time as you run and/or close programs.

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