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06-24-2017

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Lenovo ThinkPad E555 CPU throttling problem

2017-06-24, 9:48 AM

Hello. My business partners have at least two Lenovo ThinkPad E555 laptops with the same problem: under high load (I run AIDA64 Stability Test and monitored CPU frequency with HWInfo) both laptops experience CPU throttling of A8-7100 chip - only 1.6 GHz per core (picture 1) though it should be up to 3 GHz. Also HWInfo shows high temperature of the CPU and even higher temperature of the CPU package (picture 2). Also I want to note that this problem was detected even in the notebookcheck test ("Temperature" section).

I think you know about such problem with this laptop model.
Why does it happen? Due to bad cooling system, thermal paste, or due to the flaw in software or firmware of the processor, which prematurely "tells" it to reduce the frequency? What can be done to fix this?

 

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7627 Posts

09-04-2014

SK

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Re: Lenovo ThinkPad E555 CPU throttling problem

2017-06-26, 4:13 AM

Hello Juriyx, welcome to the Community,

 

which operating system, BIOS version and also which power management driver are installed on the systems please; these are details which will help with trouble shooting.

 

Andy

 

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Lenovo eServices

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UA

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Re: Lenovo ThinkPad E555 CPU throttling problem

2017-06-26, 10:18 AM

Thank you, Andy.

 

Laptop #1

Operating system: Windows 10 Home 1607 x64 (14393.1358)
BIOS version: LENOVO HTET45WW (1.17), 16.07.2015
Power management driver:

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7627 Posts

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Re: Lenovo ThinkPad E555 CPU throttling problem

2017-06-26, 10:40 AM

Hi Juriyx,

 

On that system you should definitely update the BIOS, doing so will probably resolve the issue not to mention fixing a vulnerability issue and the issue you are describing looks possibly similar to an issue fixed in v1.18.

 

http://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-edge-laptops/thinkpad-e555/downloads

 

Andy

 

English Community Administrator
Lenovo eServices

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4 Posts

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UA

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Re: Lenovo ThinkPad E555 CPU throttling problem

2017-06-26, 16:34 PM
Thanks for your advice but updating the BIOS and Lenovo PM Device driver did not help.
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UA

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Re: Lenovo ThinkPad E555 CPU throttling problem

2017-06-26, 18:50 PM
Any other suggestions?
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