HP Pavilion Laptop 15-cw0xxx Ryzen 5 capped to 400Mhz when not plugged to AC

[ErickP]

Hi, I have a HP Pavilion Laptop 15-cw0xxx with Ryzen 5 (product number 3PX72LA#ABM)

AMD Ryzen 5 2500U with Radeon Vega Mobile Gfx  

System Board 84E7 99.19

BIOS F.16

I have found that when the system is running on batteries, the CPU (all 4 cores) are capped at 400Mhz.

I simply need to know where is the cap defined, so I can remove it or adjust it. System is nearly unusable at 400Mhz.

I believe this is a show stopper because a misinformed customer wil believe notebook is damaged.

I will open a call to HP Support but since is Sunday 12/23.... perhaps the forums will provide a faster answer.

Please advice.

CPU CAp at 400Mhz

[ErickP]

Screen capture from CPU-Z shows clock multiplier at 4. So 400Mhz top speed on all cores while unplugged.

Multiplier at 4 when unplugged

Multipler at full when in AC.

with AC plugged

[The_Fossette]

@ErickP,

Welcome to the HP Forums!

This is a wonderful place to converse with the community, get assistance and find tips.

I reviewed your post and understand that when the computer is running on battery power the CPU is capped at 400MHz.

I'll be glad to help you 🙂

In order that I may provide you with an accurate solution, I will need a few more details.

• When was the last time the computer was working fine?
• Have you made any software or hardware changes on the computer?
• Have you performed any troubleshooting steps before posting?

While you respond to that, I recommend you update the BIOS and the graphics driver from the below link and check whether the issue is resolved.

https://support.hp.com/in-en/drivers

If you continue facing the issue, I recommend you perform a system test on the computer following the steps in the below article.

https://support.hp.com/in-en/document/c03467259

Let me know how it goes. Awaiting your reply!

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

Good day! Take care 🙂

Cheers!