CPU Clock speed locked at 0.48 when charger plugged in

[DavidinBrighton]

Hi. My laptop has just has a 1Tb soild state drive fitted. The same size as the old drive. It was also upgraded to Windows 10 (64-bit). I cannot say if wither of these actions is responsible for my problem, as it was not noticed before the changes.

I have an intel i7 operating at approx 2.45 Ghz when the laptop is started with the battery. When the charger is plugged in this is reined back to exactly 0.46 Ghz. If unplugged it recovers to exactly 0.79 Ghz. Turn it off and start it again with the battery and its back to approx 2.45Ghz.

So far I have had a new SSD fitted, Reloaded Windows 10, reinstalled all drivers and utilities from the HP website, New BIOS update from HP website, tested the charger, Checked installation of all Intel Drivers.

Any ideas would be much appreciated.

[A4Apollo]

Hey there! @DavidinBrighton, Thanks for stopping by the HP Support Forums!

I understand the CPU speed is very low when the adapter is plugged into your PC.

Don't worry I'll try to help you out.

Did you make any hardware or software changes on your PC?

Please provide the product number of your laptop to assist you better.

I appriciate your efforts for trying out the steps before reaching out to us.

Try updating the BIOS and chipset driver on your PC and check if it helps.

Update the BIOS using this link. Click Here

Update the chipset drivers on your PC using this link. Click Here

Set the CPU Power Options to Maximum.

The first method to resolve the low CPU speed in Windows 10, is to set the processor performance state to maximum. To do that:

1. At the search box type control panel and press Enter.
2. Change the View By (at the up right) to Small icons and then click Power Options.
3. Click Change Plan Settings.
4. Click Change Advanced power settings.
5. At 'Processor power management' options, set in Maximum processor state to 100% and click OK.
6. Then expand the System cooling policy settings and make sure that is set to Active, in order to avoid overheating.
7. Now check your CPU Speed, and if the problem persists continue to next method.

If the issue still persists after trying out the steps try the steps recommended below.

Try performing the following ts steps:
 
1 - Right-click on any open space on your computer's taskbar.
 
2 -Select "Task Manager" and press "Enter."
 
3 -Select "View" from the Taskbar Manager's pull-down menu. If more than one computer is connected to your network, notice the graphs for all CPUs. Select "One Graph Per CPU." This will help determine which computers are using more processing time.
 
4 -Go to the "Applications" tab. Because this tab shows open programs in real time, you will be able to see exactly when a program has been opened and closed at the time that it occurs. Identify and close selected programs by highlighting each one separately and clicking on "End Task" to free up processing time. (Important: Make sure all work is saved prior to closing any programs.)
 
5 -Go to the "Processes" tab and view them, but do not delete any of them unless absolutely necessary. All of the hidden system processes and programs are listed here. (Note: See Warnings section.)
 
6 -Set your computer's cooling fan to "Auto." Next, slide the Processing Speed scale to "3-4." Slide the Cooling Method scale to the middle of the range. These settings will slow down the CPU when needed
 

Also, Hit Win Key + R
Type in “Regedit” and then hit Enter.
Go to ‘HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management’
Find ‘ClearPageFileAtShutDown’ and change its value to 1
Restart the computer

Also, try the steps recommended below.

In Windows, search for Command Prompt. In the search results, right-click Command Prompt and select Run as administrator. Then click Yes.
In Command Prompt, type sfc /scannow. Make sure to include the space between sfc and the /.
Press Enter and wait while System File Checker scans for corrupted files.
When scanning is complete, the results are displayed on the screen.
If the file checker found and replaced any corrupted files, restart the computer and check the performance.
If the file checker did not find any corrupted files or found corrupted files but could not replace them, go to the next step.
If System File Checker finds corrupted files but cannot replace them, use the Deployment Image Servicing and Management (DISM) tool. DISM checks the corrupted files; then downloads and replaces the files using Windows Update.
In Windows, open a web browser.
   NOTE:
You need to be connected to the Internet to use DISM.
In Windows, search for Command Prompt. In the search results, right-click Command Prompt and select Run as administrator. Then click Yes.
In Command Prompt, type dism.exe /Online /Cleanup-image /Restorehealth. Make sure to include the space before each / in the command line.
Press Enter and wait while DISM works. This might take several minutes.
If DISM finds corrupted files, it replaces them using Windows Update. If this occurs, after DISM is finished, restart your computer and see if the performance has improved.

Refer this article to further troubleshoot lock up or freezing issues with PC. Click Here

Hope this helps!

Have a great day! 🙂

Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.

Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!