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Number of CPU cores different as reported by windows/linux

Discussion in 'Technology' started by Subarubrat, Jul 7, 2013.

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  1. Subarubrat

    Subarubrat Formula 3

    Apr 1, 2009
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    VA
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    Scott
    #1 Subarubrat, Jul 7, 2013
    I bought a cheap laptop with an i3-3110M that is supposed to have a 2 core CPU. Windows 8 reported it as such. Since windows 8 is a mess I loaded up Ubuntu Linux which of course is amazingly better. However Linux reports the CPU as having 4 cores. Is there a way to determine if this is an error in reporting or if marked off cores have been activated, I know this is possible on some CPUs but not sure about this one.
     
  2. 4RE Guy

    4RE Guy Karting

    Aug 3, 2008
    90
    #2 4RE Guy, Jul 7, 2013
    i have in I-7 3770 its a quad core...but it hyperthreads.. so will show 8 cores..(when you check)
    not sure on your cpu but food for thought
     
  3. becker

    becker Formula Junior

    Feb 20, 2001
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    Becker Cuéllar
    #3 becker, Jul 8, 2013
    I don't think they'd give an extra "core" unless is an in between chip design or some funny production issue ... the hyperthreading suggested is the likely cause, and that is a software thread and obviously would be slower than a real 4-core which will show up if u start cranking some heavy numerical stuff.
     
  4. bobzdar

    bobzdar F1 Veteran

    Sep 22, 2008
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    #4 bobzdar, Jul 8, 2013
    i3's are dual core with hyperthreading, so 2 physical cores with 2 virtual cores. i5's are 4 physical cores and i7's are 4 physical cores with 4 virtual cores.

    Windows should show the same 4 cores for an i3 as linux as the cores are determined on the chip and not on an operating system level - ie an i3 and i5 will both look like a quad core to the OS even though they operate differently internally.
     
  5. valter

    valter F1 Rookie
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    #5 valter, Jul 8, 2013
    Check a BIOS for hyperthreading option or maybe update the BIOS on motherboard. One of the OS's reads CPU ID and disregards call to query actual threads...
     
  6. SPEEDCORE

    SPEEDCORE Four Time F1 World Champ

    Jul 11, 2005
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    #6 SPEEDCORE, Jul 9, 2013

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