Windows 11 will limit the CPU when the user is away to extend battery life.

Windows 11 Will Limit CPU When User Is Away to Extend Battery Life

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Telegraph
Windows 11 Will Limit CPU When User Is Away to Extend Battery Life

Windows 11 will limit the CPU when the user is away to extend battery life. "User Interaction Aware CPU Power Management" was mentioned in a Microsoft blog post. Based on the details we have, this feature seems to try to reduce CPU usage when you're not actively using the computer. For example, if you step away from your computer for a short while and Windows doesn't detect mouse, keyboard, or other "user-level interactions", it will assume the computer is in an "inactive user" state and actively limit CPU usage. In this power-saving state, Windows will apply aggressive CPU power management settings. These settings are defined by the device manufacturer under "Processor Power Management" (PPM). The specific content...