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Select cpu frequency on macbook?


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Hi, I wonder if there is some way to change the cpu frequency using some free program or the terminal. I found this program, http://coolbook.se/, but I suppose it should be possible to control in some other way. Would be great to underclock the processor in order to make it completely quiet at full load, when watching films for example. I've heard that the macbook undervolts to 1.1 ghz if you press the power button for a certain time at boot, anyone can confirm this?


So, the thing I want to do is to set the multiplikator just as rmclock does in xp.

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