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    SubjectRe: CPU throttling??
    On Mon, 03 Feb 2003 13:57:17 -0500
    Valdis.Kletnieks@vt.edu wrote:

    > On Mon, 03 Feb 2003 17:13:02 GMT, John Bradford said:
    >
    > > Incidently, Linux has always halted the processor, rather than spun in
    > > an idle loop, which saves power.
    >
    > It's conceivable that a CPU halted at 1.2Gz takes less power than one
    > at 1.6Gz - anybody have any actual data on this? Alternately phrased,
    > does CPU throttling save power over and above what the halt does?

    Yes. I have a powerpc laptop that runs at 700 MHz. If I throttle the CPU clock
    speed down to 400 MHz and change nothing else the battery has noticeably longer
    life; since it's running slower, it takes less power when it's active (not
    halted).

    Matt
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