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How can I change the CPU clock speed of my computer? It is a Dell Inspiron 5720 laptop, running Windows 8.1 Pro. In Linux, I know there are ways of doing this from the operating system itself, instead of having to go through the BIOS, like this and this. Is this possible in Windows?

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I've only seen it done with apps from the mobo vendor, but that doesn't mean it cant be done from commandline using some utility. –  MDT Guy Nov 27 '13 at 15:23

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I believe you can achieve lower frequencies from power options menu:

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Setting maximum and minimum processor state to some percentage will probably fix the frequency on some level depending on your maximum CPU frequency.

However, this appears not to be under-clocking. A more detailed answer explains this in depth.

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