switching hyperthreading on & off from the OS ?


  1. sikelo
    Posts : 16
    Windows 7 Ultimate x64
       New #1

    switching hyperthreading on & off from the OS ?


    (not from the bios!) how can i to switch HT off and on again from Windows operating systems? (intel uttiels ,tools)
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  3. BrightBlessings
    Posts : 1,491
    Win7 Pro-64 Bit
       New #2

    Nope
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  4. LMiller7
    Posts : 2,497
    Windows 7 Pro 64 bit
       New #3

    For a number of technical reasons this is not possible.

    I think it very likely that the CPU would only permit a change in Hyperthreading state in real mode, before Windows starts.

    Changing Hyperthreading state would change the number of cores seen by the thread scheduler and raise a number of other issues as well. Windows 7 does not support this while it is running. Windows 7 has a boot option to change the number of cores but this requires a reboot, and it does not effect Hyperthreading.

    Hyperthreading can only be changed in the BIOS.
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  6. RoasterMen
    Posts : 2,047
    Windows 7 Home Premium 64-BIT
       New #4

    In a simple answer, No.
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