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    Why does my 2.8GHz CPU run at 2.9GHz?

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by hendra, Feb 5, 2010.

  1. hendra

    hendra Notebook Virtuoso

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    I have Core 2 Duo 2.8GHz. Why does CPU-Z indicate that my CPU runs at more than 2.9GHz? It runs at 2.9GHz even when idles. I don't overclock or anything. The BIOS doesn't even allow me to overclock and I don't have any overclocking software. Do I get extra speed for free?
    [​IMG]
     
    hendra, Feb 5, 2010
    #1
  2. ramgen

    ramgen -- Morgan Stanley --

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    I am observing the same behavior in my T9900. It is increasing the multiplier by 0.5 when single threaded apps are running.

    [​IMG]


    --
     
    ramgen, Feb 5, 2010
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  3. thinkpad knows best

    thinkpad knows best Notebook Deity

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    Same with my T7700 here, it goes up from stated max of 2.4 to 2.6 sometimes.
     
    thinkpad knows best, Feb 5, 2010
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  4. namaiki

    namaiki "basically rocks" Super Moderator

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    Intel Dynamic Acceleration technology (IDA)

    i7 has got the updated version of this which is well known.
     
    namaiki, Feb 5, 2010
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  5. moral hazard

    moral hazard Notebook Nobel Laureate

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    You can use throttlestop, rmclock, crystalCPUID... to make it go up by 1x instead of just .5x.
     
    moral hazard, Feb 5, 2010
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  6. jenesuispasbavard

    jenesuispasbavard Notebook Evangelist

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    ^ This. It increases the multiplier by 0.5x and idles the second core if a demanding single threaded application is running.

    On my laptop, this only works if I'm in High Performance mode, doesn't work in Balanced or Power Saver (Windows 7).
     
    jenesuispasbavard, Feb 5, 2010
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  7. sean473

    sean473 Notebook Prophet

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    Moral , u mind elaborating a little more plz ... This could help since i can't OC using SetFSB.
     
    sean473, Feb 5, 2010
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  8. moral hazard

    moral hazard Notebook Nobel Laureate

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    moral hazard, Feb 5, 2010
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  9. namaiki

    namaiki "basically rocks" Super Moderator

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    When I checked the multiplier box, my laptop hard froze. So, anyone checking it out make sure you have your open documents saved first. :p
     
    namaiki, Feb 5, 2010
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  10. moral hazard

    moral hazard Notebook Nobel Laureate

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    Sorry about that.

    Maybe try crystalCPUID.
    Function>intel enhanced speedstep control.
     
    moral hazard, Feb 5, 2010
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  11. namaiki

    namaiki "basically rocks" Super Moderator

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    Same thing, so I wouldn't be surprised if it's just my laptop.
     
    namaiki, Feb 5, 2010
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  12. IntelUser

    IntelUser Notebook Deity

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    "Dynamic Acceleration" is a laughable predecessor to Turbo Mode. Simply put, it doesn't work, unless you specifically set the affinity or whatver.
     
    IntelUser, Feb 5, 2010
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  13. moral hazard

    moral hazard Notebook Nobel Laureate

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    What?

    I know that if I run wprime single threaded, I get a faster time with IDA than without.
     
    moral hazard, Feb 5, 2010
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  14. namaiki

    namaiki "basically rocks" Super Moderator

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    oh.. to clarify, I meant my laptop hard freezes with crystal as well.
     
    namaiki, Feb 5, 2010
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  15. moral hazard

    moral hazard Notebook Nobel Laureate

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    The user who made throttlestop is on this forum, you could maybe work with him to fix the problem.

    I don't really know why it's like that. Do you have any BIOS options that have control over intel speedstep or the CPU speed?
     
    moral hazard, Feb 5, 2010
    #15