How to Reduce Fan Speed & Noise by Changing Power Plan on PC Setting (Best Method)
1The best method to reduce fan speed and noise by changing a Windows power plan setting is to limit the CPU's maximum operating frequency by adjusting the Maximum processor state to a value less than 100%. This prevents the CPU from engaging its power-hungry "Turbo Boost" or "Boost Clock" mode, which is a major source of heat and loud fan spinning.
Step-by-Step Guide to Adjusting Power Settings
This process will limit your CPU's peak performance, which reduces the heat it generates, causing the fans to spin slower and quieter.
Open Power Options:
Search for "Edit power plan" or "Power & battery" in the Windows search bar and open the resulting window.
For the active plan (usually "Balanced"), click "Change plan settings."
Click "Change advanced power settings."
Access Processor Power Management:
In the small "Advanced settings" window, scroll down and expand "Processor power management."
Set the Maximum Processor State:
Expand "Maximum processor state."
You will see two settings: "On battery" and "Plugged in."
Change the percentage for both (or just "Plugged in" for a desktop) from 100% to 99%.
Why 99%? Setting it to 99% is often the threshold that disables the processor's aggressive turbo/boost feature, which significantly reduces heat with a minimal perceived performance loss for most everyday tasks.
If the fans are still too loud, you can try lowering the value to 95% or 90%, but be aware that performance will decrease noticeably.
Set the System Cooling Policy (Optional):
Back in the "Processor power management" list, expand "System cooling policy."
Change the setting for both "On battery" and "Plugged in" from Active to Passive.
Passive tells the system to first slow down the processor to cool down before increasing the fan speed.
Active tells the system to immediately increase fan speed when heat rises.
Click Apply and then OK.
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