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Since some microcode update I get turbo mode in my Core 2 Duo - CPU reports the speeds highier then nominal and powertop denotes it as "Turbo Mode" (despite I could find information about "Turbo Mode" on Intel pages only for i3/i5/i7). Having processor in "Turbo Mode" makes my laptop overheat.

I know how to force underclocking in Linux but is it possible to disable turbo mode/lower the maximum clock on Windows?

EDIT: Previously it was called Intel Dynamic Acceleration

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In control panel in Power Options -> Edit power plan -> Change advanced power settings -> Processor power management -> Maximum processor state. I set it to <100% and it seems to work.

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You should be able to disable Turbo Boost in the BIOS setup in a Processor Features or similarly named menu.

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I don't have any such option in BIOS. – Maciej Piechotka May 6 '11 at 22:08
Look for Speedstep. Also, you can just change your power plan to maximum energy saving... – Shinrai May 6 '11 at 22:30
I have Speedstep. However I don't want to have minimal frequency (which is 800 MHz) - I'd like to just scale down from 2.8GHz+TM → 2.8GHz or → 2.1GHz. (Unless you meant to google program to interact with speedstep). – Maciej Piechotka May 7 '11 at 9:51
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