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Processor Power Management in Windows Vista and Windows Server 2008

Updated: December 13, 2007

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Windows Vista and Windows Server 2008 include updated support for ACPI processor power management (PPM) features, including support for processor performance states and processor idle sleep states on multiprocessor systems. This paper provides details of the support in Windows Vista, describes how PPM works with Windows Vista power policy, provides guidelines to BIOS developers and system designers, and includes details on how Windows Vista may be tuned to optimize the balance between performance and power savings.

The information in this white paper applies to the following operating systems:
Windows Vista
Windows Server 2008

Included in this white paper:

•	Windows Vista Processor Power Management Functional Overview
•	Processor Power Policy
•	Implementing Processor Power Management for Windows Vista
•	Processor Power Management Validation Tools
•	Optimizing Processor Power Policy on Windows

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