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Missing Processors RRS feed

  • Question

  • I have a Dell Precision 490 with 2 quad core Xeon processors. It appears only one core is being recognized. Only one core shows up in Task Manager, and %number_of_processors% = 1. Further, the performance on multi-core software has really taken a hit.

    The driver indicated in Device Manager is ACPI Multiprocessor x64-based PC. The driver version is 5.2.3790.3959.

    I am currently running Windows XP x64 SP2. Patches are up to date.

    While this may be a red herring, I also recently lost my server service, and had to replace the srv.sys with a copy from another machine. I don't know for sure when I dropped from 8 to 1 core.

    Monday, December 19, 2011 4:30 PM

Answers

  • Hi Jsulli1,

     

    I would recommend you to contact Dell personally As this is not a microsoft issue. Most likely is due to your hardware issues.


    Guowen Su
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    • Proposed as answer by Soh.M Tuesday, December 20, 2011 1:09 AM
    • Marked as answer by arnavsharmaModerator Wednesday, July 10, 2013 10:50 AM
    Tuesday, December 20, 2011 1:09 AM

All replies

  • Hi Jsulli1,

     

    I would recommend you to contact Dell personally As this is not a microsoft issue. Most likely is due to your hardware issues.


    Guowen Su
    Cisco Certified Network Associate
    Cisco Certified Internetwork professional - MPLS
    Certified Information Systems Security Professional
    Microsoft Partner Network 2011
    Microsoft Certified Professional
    Microsoft Certified Systems Administrator:Security
    Microsoft Certified Systems Engineer: Security
    Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration
    Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration
    Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration
    Microsoft Certified Technology Specialist: Windows 7, Configuring
    Microsoft Certified IT Professional: Enterprise Administrator
    Microsoft Certified IT Professional: Server Administrator
    Certified Ethical Hacker
    Computer Hacking Forensics Investigator
    Certified Sonicwall Security Administrator
    Microsoft Geeks
    • Proposed as answer by Soh.M Tuesday, December 20, 2011 1:09 AM
    • Marked as answer by arnavsharmaModerator Wednesday, July 10, 2013 10:50 AM
    Tuesday, December 20, 2011 1:09 AM
  • I have seen some articles suggesting it is a driver issue. The BIOS sees all 8 cores, and in the "Processor" item in Device manager it shows all eight cores. So I doubt it's a hardware problem.
    Tuesday, December 20, 2011 3:38 PM
  • Read the information from Microsoft @ http://support.microsoft.com/kb/309283/en-us

    I have no idea if the information has any relation to XP x64, but you can see what you think.  If this works, it is the only way to get your cores back without a re-installation.


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. ”
    Tuesday, December 20, 2011 4:45 PM