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Thread: Asrock X79 Extreme4 bios 2.10 Windows XP - Processor Throttle Not Supported




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    Default Asrock X79 Extreme4 bios 2.10 Windows XP - Processor Throttle Not Supported

    Any suggestions how to configure the bios (v2.10) in an Asrock X79 Extreme4 to get processor throttling supported in Windows XP? Seems to be working fine in Windows 7. TIA

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    Default Re: Asrock X79 Extreme4 bios 2.10 Windows XP - Processor Throttle Not Supported

    Are you referring to SpeedStep, or C-States? If so, when they are enabled in XP, the CPU does not change to it's power saving speed? What CPU do you have?

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    Default Re: Asrock X79 Extreme4 bios 2.10 Windows XP - Processor Throttle Not Supported

    Quote Originally Posted by parsec View Post
    Are you referring to SpeedStep, or C-States? If so, when they are enabled in XP, the CPU does not change to it's power saving speed? What CPU do you have?
    Intel i7-3930K. In Win XP processor CPU Vcore appears to be running at max under minimal CPU load. In Win 7 Vcore drops under minimal CPU load. Powercfg in Win XP reports Processor Throttle Not Supported.

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    Default Re: Asrock X79 Extreme4 bios 2.10 Windows XP - Processor Throttle Not Supported

    It seems we are talking about the same thing, but from different perspectives. Processor throttling is supported in later versions of XP, and then must be enabled in the OS. The following is from Intel's website, describing the requirements for SpeedStep:


    Ensure your OS has support for Enhanced Intel SpeedStep Technology. For Windows XP SP2 operating systems, install Windows XP SP2 if you haven’t already done so.
    Finally, Enhanced Intel SpeedStep Technology must be turned on in the OS. Currently, for Windows XP SP2 operating systems, Enhanced Intel SpeedStep Technology by default is off. To turn it on, do the following:
    Under "Control Panel," open "Power Options."
    Under the "Power Schemes" pull down menu, choose one of the following:
    To turn Enhanced Intel SpeedStep Technology on, select "Minimal Power Management" power scheme.
    To turn Enhanced Intel SpeedStep Technology off, select "Always On" power scheme.

    To verify that Enhanced Intel SpeedStep Technology is enabled, do the following:

    Close all applications and ensure that Windows OS is in idle mode. Press Ctrl + Alt + Delete and select the "Performance" tab. Verify that CPU usage is 0.
    Right click "My Computer" and select, "Properties."
    Under the "General" tab, examine the installed processor and speed. If Enhanced Intel SpeedStep Technology is enabled, two processor speeds will be listed. The first speed listed is the specified speed of the processor. The second speed is the current operating speed. The second speed will be less then the first speed. (See Figure 1.) This indicates that Enhanced Intel SpeedStep Technology has effectively lowered the processor voltage and core frequency, which can (depending on system usage and design) result in decreased average power consumption and decreased average heat production. If Enhanced Intel SpeedStep Technology is off, then both processor speeds will be equal. (See Figure 2.) If the processor is not in idle mode, Enhanced Intel SpeedStep Technology can be enabled and both processors speeds can be equal. If this happens, try steps 1-3 again.


    You can read the entire page here: Enhanced Intel SpeedStep® Technology - How To Document

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    Default Re: Asrock X79 Extreme4 bios 2.10 Windows XP - Processor Throttle Not Supported

    Thanks for that. Selecting different power options under Win XP make no difference, and My Computer|Properties show the CPU always running at full 3.20 GHz under 0% load. Speedfan always reports Vcore at 1.11v under 0% load. Together this results in CPU core temperatures running at close to 60 degrees celsius.

    In Win 7 (same pc, same motherboard, same bios version and settings) Vcore drops to 0.84v under 0% load and frequency down to 2.2 GHz under 0% load. CPU core temperatures are at about 40 degrees celsius.

    It is my understanding that if Powercfg in Win XP reports that Processor Throttle is Not Supported then Intel Enhanced Speedstep is not working, and I conclude that there is something in the bios setup that needs to be changed for Speedstep to work under Win XP. I have tried a number of combinations of settings of Speedstep and the C-states without success.

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