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Supported C-states alderlake mobile cpu's

etnivor
Beginner
1,817 Views

Hello,

I have 2 computers from different vendors with an alderlake cpu's i7-1260P and a i5-12500H.

 

Cores on both go down to C6-C7, but package C state never go bellow C3. I can not find any datasheet for these cpu's so I am wondering can these cpu's go bellow C3 or is it just misconfiguration in firmware?

 

If cpu do support lower states, what can be blocking it from reaching them? I can see that cpu package power consumption increases when disabling ASPM.

On both machines PCI devices have ASPM enabled and set to L1.

 

I am using linux and to monitor C states I have been using powertop 1.15 and CoreFreq.

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etnivor
Beginner
1,806 Views

Update 1:

Found this, so maybe it's a Linux Kernel problem(feature) with alderlake cpu's.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2017158

 

Will do a windows install and see how it behaves there.

 

 

Edit: Tested installing 11 and used throttlestop to monitor c states and in win11, packages C states did not go bellow C0/C1 so it was even worse.

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DeividA_Intel
Employee
1,787 Views

Hello etnivor,  


  

Thank you for posting on the Intel® communities. I understand that you need information related to the Intel® Core™ i7-1260P Processor and Intel® Core™ i5-12500H Processor.


In order to better assist you, please provide the following:  


1. Are you having any performance issues?

2. Are you experiencing any errors, crashes, or blue screen of death?

3. Are you having any issues with apps or tools? If so, what are the names?


You can find information related to the C-State for the 12th generation processor you can check the following link under "12th Generation Intel® Core™ Processor Family> Volume 1> from page 62" If you have any questions about the datasheet, please let me know.




Regards,  

Deivid A.  

Intel Customer Support Technician  


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etnivor
Beginner
1,776 Views

Neither,

I want to lower the power consumption of my pc's.

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DeividA_Intel
Employee
1,760 Views

Hello etnivor, 


Thanks for your response. If you want to lower the power consumption of your computer you may need to check with your motherboard manufacturer to confirm if there are any settings at the BIOS level that can help you control the power consumption.


You may also try the recommendations from Microsoft as well:


You can find information related to the C-State for the 12th generation processor you can check the following link under "12th Generation Intel® Core™ Processor Family> Volume 1> from page 62" If you have any questions about the datasheet, please let me know.




Please keep in mind that this thread will no longer be monitored by Intel.  


Regards,  

Deivid A.  

Intel Customer Support Technician  


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