Table of Contents



Applies to


Windows Server 2008 R2, Windows 7  


Details

Product

Windows Operating System

ID

6

Source

Microsoft-Windows-Kernel-Processor-Power

Version

6.1

Message

Some processor performance power management features have been disabled due to a known firmware problem. Check with the computer manufacturer for updated firmware.


Cause

This event is thrown when one or more of the following conditions exists:

  • Motherboard features controlled by the BIOS are not compatible with Windows  7
  • You have disabled “Speedstep” in your EVGA BIOS
  • Several support forums indicate that this problem started after installing Vista Service Pack 1 and the KB940510 and KB936330 hotfixes. Some users say that if those 2 hotfixes are not installed the problem is not happening anymore. To install only selective hotfixes you have to do the Windows update manually instead of having them automatically downloaded and installed.

User Action

1. Update the BIOS firmware for the motherboard

2. If your motherboard supports Speedstep,  make sure Speedstep is enabled.

3.  Check with your hardware manufacturer to determine if there are known compatibility issues with Windows 7. 

4.  Try disabling processor power management features.


Related Information

Microsoft Extended PSS ACPI Method Specification  http://msdn.microsoft.com/en-us/windows/hardware/gg463276

Processor Power Management in Windows Vista and Windows Server 2008  http://msdn.microsoft.com/en-us/windows/hardware/gg463252

Power Policy Configuration and Deployment in Windows  http://msdn.microsoft.com/en-us/windows/hardware/gg463243

Using PowerCfg to Evaluate System Energy Efficiency  http://msdn.microsoft.com/en-us/windows/hardware/gg463250