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    Intel Turbo Boost Not Kicking In

    Discussion in 'Alienware M15x' started by TheHighlightGuy, Apr 28, 2011.

  1. TheHighlightGuy

    TheHighlightGuy Notebook Consultant

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    Hey all,
    I'm trying to convert a few video files at the same time which results in my CPU usage to shoot up to 100%, but only with a 15x multiplier which ends up being about 1.99Ghz. My question is why isn't Turbo kicking in and bumping me up to a 24x multiplier & 3.2Ghz?
    I've toggled Stealth Mode, toggled Speedstep (which resulted in a detrimental 9x multiplier), and I'm on A/C power.
    What's the deal?
    Attached screenshot of HWinfo32 while converting
     

    Attached Files:

    TheHighlightGuy, Apr 28, 2011
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  2. TheHighlightGuy

    TheHighlightGuy Notebook Consultant

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    Also, I'm on BIOS version A09
     
    TheHighlightGuy, Apr 28, 2011
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  3. svl7

    svl7 T|I

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    Sounds totally normal, standard clock speed of the 840qm is 1.86GHz, this would result in 14x multi. With 1.99GHz means a multi of 15, that's the turbo boost multi of your CPU for 4 active cores if I remember correctly.
    The 3.2GHz max turbo frequency is only for one active core, converting video files is usually mutlithreaded, so all cores are active. Nothing's wrong imo.
     
    svl7, Apr 28, 2011
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  4. TheHighlightGuy

    TheHighlightGuy Notebook Consultant

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    I see, thanks for the clarification.
    +rep when I can!
    In what applications could I achieve the 3.2GHz max?
     
    TheHighlightGuy, Apr 28, 2011
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  5. svl7

    svl7 T|I

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    In single threaded workloads, like in older software or some calculations. And also only as long as you're running the CPU withing the thermal envelope...

    If you want to see your CPU speed up to 3.2 GHz just for fun, you can quickly run wPrime 1.55 and run a 32M test on one thread... this should give you the max turbo boost.
     
    svl7, Apr 28, 2011
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  6. TheHighlightGuy

    TheHighlightGuy Notebook Consultant

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    I think I will lol
    Thanks again

    Can a Mod close this thread now?
     
    TheHighlightGuy, Apr 28, 2011
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