i5 1240P E cores are not working when system is idle

[SanyamM]

Hello everyone,

I purchased a laptop in 2022 with the intel core i5 -1240P (4 P cores, 8 E cores) and nvidia geforce gtx 1650 with 8gb ram. i recently noticed in HW Monitor that even when my laptop is idle or i am browsing chrome, only my performance cores are functional and the usage of efficiency cores is 0.

But my P cores should only be used when a high performance task is performed and E cores should be responsible for background tasks. Even when the laptop is idle and no  applications are open in windows, only E cores need to be used. But in my case, P cores are being used even in idle condition resulting in more battery usage and less battery life. 

what should i do to rectify this situation?

[DeividA_Intel]

Hello SanyamM,  

Thank you for posting on the Intel® communities. I am sorry to know that you are having issues with your Intel® Core™ i5-1240P Processor.     

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

1. What is the brand and model of your laptop?

2. What is the BIOS version installed?

3. What is the operating system installed as well as the version and build?

4. Were the E-Cores working properly before? If so, when did the issue start?

5. Have you performed any hardware or software changes recently?

Regards,   

Deivid A.  

Intel Customer Support Technician  

[SanyamM]

1. My laptop is Acer Aspire 7 A715-51G

2. My laptop's bios version is 1.08 which is the latest for this model provided by acer's website.

3. I have windows 11 home 22H2 version. OS build - 22621.1992

4. I didn't noticed the performance of e cores before I just randomly spotted the usage when I was checking my cpu temperature and battery health.

5. I did a clean windows 11 install 2 or 3 months back because the previous version of my windows was giving me errors on some applications. 

[DeividA_Intel]

Hello SanyamM, 

Thanks for your response. I have checked further and I can confirm that this behavior with the E- cores and P-core is normal and expected as the "Technical Product Specification" mentions. 

"While executing a code Enhanced Intel SpeedStep Technology and Intel Speed Shift technology optimize the processor’s IA core frequency and voltage based on workload. Each frequency and voltage operating point is defined by ACPI as a P-state. When the processor is not executing code, it is idle, and it is an expected behavior. For more information refer to the technical processor specifications, Processor IA Core Power Management section."

You can check the file in the following link, under "12th Generation Intel® Core™ Processor Family> supporting 12th Generation Intel® Core™ processor families for the desktop platform, formerly known as Alder Lake> Volume 1":

• https://www.intel.com/content/www/us/en/products/docs/processors/core/core-technical-resources.html

Are you experiencing any Blue Screen of Death? Any freezing? Or crashes? Let me know if you have any performance issues with your CPU.

Regards,  

Deivid A.  

Intel Customer Support Technician  

[DeividA_Intel]

Hello SanyamM, 

This follow-up is to confirm if you are having any Blue Screens of Death, freezing, and/or crashes. Let me know if you need further assistance.

Regards,  

Deivid A.  

Intel Customer Support Technician  

[DeividA_Intel]

Hello SanyamM,

I was checking your thread and see that we have not heard back from you.  

I’m going to close your post, but if you need further assistance, please do not hesitate to create a new thread. 

Regards,  

Deivid A.  

Intel Customer Support Technician