vegameta/windows_cpu_frequency_powercfg_changer

WINDOWS_CPU_FREQUENCY_POWERCFG_CHANGER

A tool for limiting max CPU frequency in Windows by changing powercfg settings

• Useful for laptops
• Prevents power overuse
• Prevents overheating during the routine use or downtime
• Full max CPU frequency control

Requirements

• Windows
• Python >= 3.8
• Git (optional)
• UAC admin rights accessibility

Installation

(Make sure Python is in your system PATH environment variable)

Default installation:

git clone https://github.com/VEGAMETA/WINDOWS_CPU_FREQUENCY_POWERCFG_CHANGER.git
cd WINDOWS_CPU_FREQUENCY_POWERCFG_CHANGER

python -m venv venv
.\venv\Scripts\pip install -r requirements.txt

Running

To run the script you can use (and modify as you want) freq.bat or run by command:

.\venv\Scripts\pythonw .\main.py

or

.\freq

Configuration

Check config.ini and read the comments

Additionally

Turn off any other built-in or other limiter utilities for proper operation.

If you want to run the script hidden in system tray from a start run:

freq.bat -h

To change frequency manually in windows power settings you must unhide PROCFREQMAX attribute by running following command (runs automatically if an attribute was hidden)

powercfg -attributes SUB_PROCESSOR PROCFREQMAX -ATTRIB_HIDE

Make sure that script execution is enabled if you activate the venv in powershell:

Set-ExecutionPolicy -Scope CurrentUser RemoteSigned

This command stops the service, so you can delete OpenHardwareMonitorLib.sys file if you need to:

sc stop WinRing0_1_2_0

Use at your own risk, the developer is not responsible.