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    How does windows number physical/logical i7 cores?

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by JohnnyFlash, Jun 20, 2010.

  1. JohnnyFlash

    JohnnyFlash Notebook Virtuoso

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    In task manager for example, is it every odd numbered core is physical, or is it the first four?
     
    JohnnyFlash, Jun 20, 2010
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  2. lackofcheese

    lackofcheese Notebook Virtuoso

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    Technically speaking, all of the cores are logical. I believe that the cores are numbered by a single physical cpu at a time, i.e. cores 0/1 are physical core 0, 2/3 -> 1, 4/5 -> 2, 6/7 -> 3.

    As such, if you wanted your program not to make use of Hyper-Threading, you could use, say, 0, 2, 4 and 6, or 1, 3, 5 and 7, or any of 16 possible combinations.
     
    lackofcheese, Jun 20, 2010
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  3. JohnnyFlash

    JohnnyFlash Notebook Virtuoso

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    Ok, thanks. That's how I was thinking it would work, but I wasn't sure.
     
    JohnnyFlash, Jun 20, 2010
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  4. G73Guy

    G73Guy Notebook Consultant

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    Setting the affinity in Task Manager is having zero effect on CPU core usage for me.

    I wish I could turn off HTT.
     
    G73Guy, Jun 20, 2010
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  5. lackofcheese

    lackofcheese Notebook Virtuoso

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    Can't you do it in BIOS?
     
    lackofcheese, Jun 20, 2010
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  6. G73Guy

    G73Guy Notebook Consultant

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    I don't think I can. Did not see as option when I looked in the past. Asus G73, anyone know?

    Desktop guys were saying HTT decreases gaming performance. Many were disabling.
     
    G73Guy, Jun 20, 2010
    #6