cancel
Showing results for 
Search instead for 
Did you mean: 
VoidBaron
New member
1 0 0 0
Message 1 of 2
93
Flag Post
HP Recommended

CPU slows down when plugged-in

HP Pavilion Gaming 15-ec0016nm
Microsoft Windows 10 (64-bit)

Hi!

I have a weird problem with CPU throttling. Laptop works fine on battery, but the moment I plug in the charging cable, CPU slows down to 400mhz. FPS in games falls drastically and laptop becomes useless. If I disconnect the cable, it works at full power again, instantly. I have read about similar problems, and most people solve it either by BIOS update or by replacing the power adapter (if it is not powerful enough). I tried that and it does not help - no matter what I try, CPU throttles at 400mhz when plugged in.  CPU in question is AMD Ryzen 5 3550H, and laptop is Pavilion 15-ec0016nm. 

Here is what I tried so far:

  • I re-installed windows 10
  • I checked my power adapter -  it is official HP 150W adapter provided with laptop (which should be enough)
  • I reset all BIOS settings to default
  • I updated the BIOS to the newest version
  • I updated all CPU and other drivers to newest versions
  • Under the windows power settings, I created a custom power plan and set min and max CPU power state to 100%
  • In GeForce experience app I disabled whisper mode and battery boost, everything that could artificially slow down the CPU
  • I made sure I'm not using any other programs that could interfere with CPU function

Since I use the laptop for gaming, this situation is very frustrating. I would appreciate any help!

1 REPLY 1
HP Support Agent
HP Support Agent
19,640 19,628 1,297 1,965
Message 2 of 2
45
Flag Post
HP Recommended

CPU slows down when plugged-in

@VoidBaron,

 

Welcome to the HP Support Community!

 

I reviewed your post and I understand that the CPU throttles when the AC adapter is connected.

 

Don’t worry, I assure you I will try my best to get this sorted.

 

I see that you have already followed all the relevant troubleshooting steps and I recommend you contact support to further diagnose the issue.

 

Here is how you can get in touch with support.

 

1)Click on this link – www.hp.com/contacthp/

2)Select the product type.

3)Enter the serial number of your device or select let HP detect your product option.

4)Select the country from the drop-down.

5)You should see the HP phone support number or Chat option listed.

 

Let me know how it goes and you have a great day!

 

If you wish to show appreciation for my efforts, mark my post as Accept as Solution. Your feedback counts!

 

Cheers!

 

The_Fossette
I am an HP Employee

Reply
0 Kudos
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation