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Thread: High CPU usage on a fresh Windows 7 x64 installation




  1. #1
    Join Date
    Mar 2011
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    Default High CPU usage on a fresh Windows 7 x64 installation

    Hello,

    I recently reloaded the operating system on my all purpose server PC but I'm having a serious issue. I installed Windows 7 64 bit on an ASRock ALiveNF6G-VSTA (nVIDIA nForce 6100-430) motherboard. The CPU is an old Phenom 9850BE with 4GB of ram and using the onboard video. After the OS was installed, the CPU usage is very high on idle.

    Process Explorer shows that the high cpu usage is used by DPCs, System and SMSS. See here:



    I used the xfperf tool from the Microsoft Performance Toolkit to find out what exactly is causing this. It found that its being caused by a few driver/system files: ACPI.sys being the mail culprit. This leads me to believe that it could be a driver issue. I started with the default drivers that the OS installed then tried the drivers on the ASRock website (they said Vista 64bit, not Win7) but they didn't make a difference. I also installed the the latest nforce drivers (15.49) with no change. I'm at a loss on how to troubleshoot this.


    Screenshots here and here

  2. #2
    Join Date
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    Default Re: High CPU usage on a fresh Windows 7 x64 installation

    Just something to try.
    Are you running power options in balanced mode, or high performance?
    In Balanced mode your cpu will run at about half speed initially and then throttle up and down as needed. This does not always play nice with system utilities and benchmarks.
    How to Manage Windows 7 Power Settings - EnterpriseITplanet.com / Green

    You can use cpuz to see if the cpu is running at the maximum Mhz.
    CPUID - System & hardware benchmark, monitoring, reporting
    CPUID - System & hardware benchmark, monitoring, reporting
    Last edited by artdrivers; 03-08-2011 at 03:50 AM.
    http://forums.tweaktown.com/gigabyte...ench-test.html
    http://www.gigabyte-usa.com/FileList...ios_qflash.pdf
    Phenom II 945 @ 3.2Ghz w/Thermaltake Big Typhoon Pro 14 CPU Cooler
    Gigabyte GA-MA78GM-S2H rev.1.1 F11
    Sapphire 3870HD / 100225L / 512MB / ddr4
    4GB / Kingston / KHX8500D2K2/2GN / 5-5-5-18 / 1066Mhz
    (2) WD Caviar / WD2500AAKS/ 250GB in SATA RAID-0
    (1) WD Caviar / WD2500AAKS/ 250GB in SATA AHCI
    (2) IDE's 1 8XdualDVDRW 1 52x32x52x CDRW
    Antec /Neo HE550 / 550W
    Mid size ATX case with show through panel
    2) 80x80 front fans (1) 120x120 rear fan and small nb fan
    Microsoft comfort curve USB keyboard 2000 ver.1.0
    Logitech G500 USB mouse
    Monitor: CMV937A
    7.1+2 Channel High Definition ALC889A
    Dual boot Windows 7 32bit home & Windows 7 64bit home


  3. #3
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    Default Re: High CPU usage on a fresh Windows 7 x64 installation

    Its currently set to balanced

    edit: changed it to high performance and power saver and no change on the CPU usage.
    Last edited by TiberiusE; 03-08-2011 at 03:48 AM.

  4. #4
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    Default Re: High CPU usage on a fresh Windows 7 x64 installation

    I see what you mean. Mine is in Balanced mode so that isn't it. My idle process is 90% and above right now. Although I do have a Graphics card. Which does not use system resources like onboard Graphics does. Could that be it?
    Have you used Windows update in all programs to update everything?
    You can use cpuz to see if the cpu is running at the maximum Mhz.
    http://www.cpuid.com/softwares/cpu-z.html

    By artdrivers at 2011-03-07
    Last edited by artdrivers; 03-08-2011 at 04:26 AM.
    http://forums.tweaktown.com/gigabyte...ench-test.html
    http://www.gigabyte-usa.com/FileList...ios_qflash.pdf
    Phenom II 945 @ 3.2Ghz w/Thermaltake Big Typhoon Pro 14 CPU Cooler
    Gigabyte GA-MA78GM-S2H rev.1.1 F11
    Sapphire 3870HD / 100225L / 512MB / ddr4
    4GB / Kingston / KHX8500D2K2/2GN / 5-5-5-18 / 1066Mhz
    (2) WD Caviar / WD2500AAKS/ 250GB in SATA RAID-0
    (1) WD Caviar / WD2500AAKS/ 250GB in SATA AHCI
    (2) IDE's 1 8XdualDVDRW 1 52x32x52x CDRW
    Antec /Neo HE550 / 550W
    Mid size ATX case with show through panel
    2) 80x80 front fans (1) 120x120 rear fan and small nb fan
    Microsoft comfort curve USB keyboard 2000 ver.1.0
    Logitech G500 USB mouse
    Monitor: CMV937A
    7.1+2 Channel High Definition ALC889A
    Dual boot Windows 7 32bit home & Windows 7 64bit home


  5. #5
    Join Date
    Mar 2011
    Location
    USA
    Posts
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    Default Re: High CPU usage on a fresh Windows 7 x64 installation

    CPU Z shows that its running at regular speed. At this point, I'm going to try a video card and see if it makes a difference. Not sure what else to do.


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