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05-12-2018

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X270 i5-7200 CPU throttles to 0.38GHz when using the 6 cell battery, any ideas on how to solve this?

2019-09-12, 11:17 AM

I have an issue with CPU throttling on a new X270 with an i5-7200 processor that I picked up a few days ago.

The machine works as expected when plugged in or when running off the non-removable battery. However, there is an issue when running it from its ThinkPad Battery 68+ (6 cell) part number 0C52862. As soon as the machine starts running from the 6-cell battery, the CPU gets throttled to 0.38GHz and everything becomes super slow and barely usable. Even keystrokes take a second to register.

It's very strange because when first powering on the machine, it runs unthrottled for 10-15 seconds before the throttling kick in.

 

As soon as the battery is disconnected, the throttling stops and performance returns to normal.

This is exactly the same issue as these people have been having, with the same CPU on the T470 - even the throttling frequency is the same:
https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/T470-Heavy-CPU-Throttling-on-Battery/td-p/3783920
https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/Lenovo-T470-Core-i5-7200u-Slow-performance-on-battery/td-p/3757849

I have updated to the latest BIOS available and reset the BIOS settings to default however the problem remains. Lenovo Vantage is installed as well as all the latest updates/drivers.

 

I sent in a support ticket several days ago but have still not heard back. Any ideas on how to solve this?

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2 Posts

10-13-2019

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Re: X270 i5-7200 CPU throttles to 0.38GHz when using the 6 cell battery, any ideas on how to solve t

2019-10-13, 17:53 PM

I have this issue too. Although I have i7-7600

What I have noticed is:
- the problem is appearing after the PC was in SLEEP mode, no problem after HIBERNATE
- the problem is appearing after RESTART, no problem after SHUTDOWN.

So, I ended up not using SLEEP and not making a RESTART, but a full SHUTDOWN.

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2 Posts

10-13-2019

US

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  • Posts: 2
  • Registered: ‎10-13-2019
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  • Views: 25
  • Message 3 of 3

Re: X270 i5-7200 CPU throttles to 0.38GHz when using the 6 cell battery, any ideas on how to solve t

2019-10-13, 18:35 PM
It is definitely BIOS and should be addressed by Lenovo with BIOS update. Yes, I do have the latest BIOS.
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