cancel
Showing results for 
Search instead for 
Did you mean: 

Processors

Highlighted
Journeyman III
Journeyman III

AMD Ryzen 5 2500U locked to 400MHz on battery

Hi,

I have HP Pavilion 15-cw0002 laptop with AMD Ryzen 2500U CPU but I have major issue running the laptop on battery. I am running Windows 10 Home 64 bit. Whenever I turn on the laptop when disconnected from the AC adapter, the CPU speed is capped to 400MHz. The speed does not change no matter how CPU intensive program I run. It is only remedied by a restart or by plugging in the laptop.

I am attaching screenshot from CPU-Z showing CPU speed & Mainboard//BIOS info. I have also attached a screenhshot of Windows Task Manager showing the low CPU speed According to CPU-Z it seems that the multiplier is set to x4 which seems incorrect or?

Steps I have taken so far to remedy the issue:

- Install all available BIOS updates

- Install all available Windows Updates

- Install latest available drivers for all components

- Reset Windows several times

The issue seems to be persistent. Is this a know issue? What can I do to fix for this?

Regards,

Mohsin

39 Replies
Highlighted
Adept I
Adept I

Re: AMD Ryzen 5 2500U locked to 400MHz on battery

I'm having exact same issue with this laptop on a 2300u. It throttles down as soon as you unplug it. If you have Task Manager open you'll see it drop down and then spike back up. If you have the laptop turned off or in standby then it won't throttle back up until you reboot or plug it back in. Very frustrating and I haven't gotten anywhere with HP support on it yet. I've tried completely resetting the windows install and different power options (even setting minimum CPU level) but it seems to ignore all that. So.. I'm wondering if it's more of a firmware issue in the chipset (also interesting that it's throttled when unplugging it even when completely powered off)

Highlighted
Elite
Elite

Re: AMD Ryzen 5 2500U locked to 400MHz on battery

I have a different HP model that also have the Ryzen 5 2500U. On power, the Vega 8  won't go past 400 Mhz running CAD, but if I run the the GPU-Z ?pcie render test it does go beyond  +800 mhz.

Highlighted
Adept I
Adept I

Re: AMD Ryzen 5 2500U locked to 400MHz on battery

Registered here just to reply to this post to say I'm having the exact same issue with a HP 15-cw0597sa with a Ryzen 3 2300U processor.

If the laptop is on charge and it is put to sleep, then the AC adapter is removed without first waking the laptop, the CPU gets stuck at 400mhz, as soon as the AC adapter is reconnected, the CPU jumps up to maximum speed, if the adapter is then removed, the speed is throttled to 400mhz again, the only way to resolve the issue for that session is to restart the computer.

This has to be a firmware issue of some sort, its strange that only HP laptops seem to be affected, if it was a widespread Ryzen Mobile issue, there would be more than just a couple of posts found when you search for Ryzen 400mhz in Google.

HP are 'supposedly' looking into the issue for me but I won't hold my breath. If its not resolved before the warranty runs out, I will be tempted to exercise the warranty to get them to replace the laptop as its 100% reproducible.

0 Kudos
Highlighted
Adept I
Adept I

Re: AMD Ryzen 5 2500U locked to 400MHz on battery

I bought a inspiron 7375 Ryzen 7 2700U and I have the same problem, But always when I start the laptop the frequency stuck at 400 mhz and I need a reset to frequency come back to normal...

The other issue that I have with this laptop is the fan is always at 100%, and the noise is terrible!

Dell doesn't know how make laptop with Ryzen.... Cause I have a Huawei Matebook D Ryzen 5 2500u and it is much better than this Dell!

Dell Brazil charge me about 520 dollars to "fix" this problems! I don't like Dell, and now I don't like more...

0 Kudos
Highlighted
Adept I
Adept I

Re: AMD Ryzen 5 2500U locked to 400MHz on battery

I have the same issue.

Highlighted
Exemplar
Exemplar

Re: AMD Ryzen 5 2500U locked to 400MHz on battery

Sounds like you all need to talk to your LT manufacturer Support group.  All of you please use the image icon at the top of the reply dialog to post a screenshot of Ryzen Master (RM).  Perhaps the processor is badly overheating and throttling.  RM will tell us.  Have some of you changed the processor in your LT?  Perhaps you have exceeded the cooling capability on the machine.  2700 Specifications:

2700.jpg

Can a LT handle 65 Watts of heat?  Too much processor?   Enjoy, John.

0 Kudos
Highlighted
Forerunner
Forerunner

Re: AMD Ryzen 5 2500U locked to 400MHz on battery

Those are the specs for the desktop processor (AM4).

This is for the "Mobile" processor.

AMD Ryzen™ 7 PRO Mobile 2700U with Radeon™ Vega 10 Graphics | AMD

Highlighted
Journeyman III
Journeyman III

Re: AMD Ryzen 5 2500U locked to 400MHz on battery

I have exactly the same problem but instead of 400MHz I only got 300MHz, even if I turn the power mode to best performance or I switch it to battery life the CPU speed it keeps the same, it just changes when I plug it in or restart. I tried to install new drivers but it looks AMD doesn't have them on their page, so I decided to go to the HP website, I looked for my model CW0009la and the only one that was available was the 1.7 version which is pretty old. I tried to install the new version of Adrenalin but when I do it, it just say that I have already installed the last drivers which isn't real.

Also when I'm using Chrome it crashes each 15 minutes, or if I'm watching YouTube videos the screen flashes green and then disappears. I have a 128GB SSD and 12GB of RAM, also it's always cooled properly and I don't force it to run hard programs, I can't explain the bad behavior.

Highlighted
Adept I
Adept I

Re: AMD Ryzen 5 2500U locked to 400MHz on battery

Those are the specs for the desktop processor (AM4).

This is for the "Mobile" processor.

0 Kudos