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Airin's Notes

Category: Windows 🠪 Issues
CPU speed is throttled to low speed on battery power
November 26, 2023

Try installing any firmware updates.
Try unplugging charger, plugging back in, or a different charger.
If those don't work, then...

The best workaround (so far) is to:
Download ThrottleStop and uncheck "BD PROCHOT".
https://www.techpowerup.com/download/techpowerup-throttlestop/

Bad workaround is to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Intelppm
Change 'Start' value to '4' from the default of '3'. This disables SpeedStep, which means the CPU runs at full speed, and will use more power.
Note that this is for Intel CPU's, an AMD CPU has a similar registry key.

I tried all the other fixes listed here and none worked.
https://www.wintips.org/fix-cpu-not-running-at-full-speed-in-windows-10/

If it is a Dell laptop, this may be because it doesn't recognize the power adapter. To test, unplug the power adapter and if the laptop runs at full speed, this is the issue. The app ThrottleStop may work, or you may need to replace the power adapter.


Keywords: Unbearable slow, Processor Throttling, Ghz, Mhz, Limited, crawl





This site is meant to be used as a reference for myself, although others may find it useful. I use it to keep track of certain fixes, software, and other solutions which I may need while assisting customers. The page layout is pure HTML/CSS and is kept simple to optimize loading time and fast results.

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