Adjust Critical Thermal Shutdown in Regedit

This guide explains how to locate and configure system-wide critical thermal shutdown thresholds using the Windows Registry Editor (Regedit). By modifying the ACPI thermal zone parameters in the registry, you can define the exact temperature limit at which Windows forces a safety shutdown to prevent hardware damage.

Understanding Temperature Values in Regedit

Windows calculates ACPI thermal levels in tenths of degrees Kelvin (\(10 \times K\)). To set your desired temperature in Celsius, use the following conversion formula:

\[\text{Value} = (\text{Temperature in } ^\circ\text{C} + 273.2) \times 10\]

Steps to Adjust the Thermal Shutdown Threshold

  1. Open Registry Editor
    • Press Win + R, type regedit, and press Enter.
    • Click Yes if prompted by User Account Control (UAC).
  2. Navigate to the Power Control Key

    • In the address bar at the top, paste the following path and press Enter:

      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power
  3. Locate or Create the Thermal Key
    • Look for a subkey named Thermal or ThermalZones under Power.
    • If it does not exist, right-click the Power folder, select New > Key, and name it Thermal.
  4. Create the CriticalTripPoint Value

    • Select the Thermal key in the left pane.

    • Right-click an empty area in the right pane, select New > DWORD (32-bit) Value, and name it:

      CriticalTripPoint
  5. Set the Temperature Limit
    • Double-click CriticalTripPoint.
    • Under Base, select Decimal.
    • In the Value data field, enter your calculated value (for example, 3732 for 100°C).
    • Click OK.
  6. Reboot the System
    • Close the Registry Editor.
    • Restart your computer to allow the Windows ACPI driver to load the new thermal parameters.

Important Considerations