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    SubjectRe: Status of X86_P4_CLOCKMOD?
    Date
    Johannes Stezenbach wrote:

    > If someone has done measurements I'd be interested to
    > know the numbers about the actual power savings which
    > can be achieved by using P4 clock mod. I don't expect
    > it to be much, but I bet it's more than 1W.

    Clock modulation can reduce power by 40W on a 3.6GHz Xeon when the
    system is running a high-power application (e.g. Linpack). (It also
    reduces performance by a factor of 6-10). Clock modulation saves no
    power at all during idle.

    Wes Felter - wesley@felter.org

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