Windows 7 only showing one core on my i7 processor


  1. punker001
    Posts : 1
    Windows 7 home premium 64-bit
       New #1

    Windows 7 only showing one core on my i7 processor


    Can anyone help me? I have recently bought a Dell XPS 15z laptop from eBay and it has an i7 2640m processor which according to the Intel website is a dual core processor. Well the problem i'm having is when I run task manager and CPU-Z etc, only one core is showing under performance. Has anyone had this problem and do you know what the issue is? I have tried pretty much everything including reset Bios etc. If I had any hair I'd be tearing it out lol. Any help appreciated
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  3. bassfisher6522
    Posts : 2,240
    Windows 7 Ultimate 64 bit
       New #2

    Have a look at this...

    Processors - Limit Number Used by Windows 7

    and

    HOWTO: Get Windows 7 to detect your new multi-core processor - Microsoft Answers
    Last edited by Brink; 08 Aug 2012 at 21:48. Reason: added link for more info
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