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7256 Posts

10-29-2009

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Re: Lenovo X270 noisy fan

2017-07-10, 14:03 PM

Tom139

 

We haven't been able to reproduce a situation where the fan runs all the time.  I compared X240, X250, X260, and X270 and found that the fan behavior and sound is similar on all 4 models.  If anything, my X270 here is quieter.  So now I am wondering if there is something wrong only with your particular system.

 

Have you noticed a particular event which causes the fan to turn on and stay on like you say?  For example, reboot and do XYZ and then observe that the fan seems stuck on?

 

I was also a bit confused with what you were saying about the Intel Processor Diagnostic Tool.  Are you saying that running this tools causes fan misbehavior?

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9563 Posts

01-13-2008

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Re: Lenovo X270 noisy fan

2017-07-10, 14:01 PM

The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc.


The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored - questions and answers belong in the forum so that others may contribute and benefit. ... GeezBlog

 

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10 Posts

06-19-2017

Germany

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Re: Lenovo X270 noisy fan

2017-07-10, 20:19 PM

What I tried to say with the Intel tool is that there is no different in the sound between full load of the CPU and idle operation. Today the fan is regulating again and is switching off as well. If the fan is off it’s already enough to start an application like Firefox, that the fan is on again. I really can’t find an explanation for this behavior of the fan….

 

That is already enough load that the fan is switching after 10 seconds

 

Before got the X270 I had an X301 and X230. On this PCs I never recognize the fan in normal operation (normal CPU load).

 

The question for me is really how the fan is controlled in the end? What’s the impact of Windows settings on this behavior and what is controlled by the BIOS? What are the parameters for switching on and off of the fan or may it's normal that the fan is on with an average load below 10%?

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7256 Posts

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  • Message 14 of 89

Re: Lenovo X270 noisy fan

2017-07-11, 17:29 PM

Tom139

 

Fan speed is conrolled by CPU temperature.  In the case of X270, it comes on at 49C and turns off at 45C.  There is a little bit of delay as the fan ramps up and down when the temperature triggers are reached.  But I think you should be able to observe this behavior by watching the CPU temperature.  My favorite tool for this purpose is CPUID HWMonitor.  Can you please give it a try and let me know your observations?

 

What idle temperatures are you seeing on your X270?

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Re: Lenovo X270 noisy fan

2017-07-11, 20:18 PM

Thanks. I guess we are getting closer...

 

I checked the CPU temperature today with the tool you recommended. If the PC is plugged-in the CPU temperature remains at around 48°C to 50°C if the CPU is “idle”. On battery the CPU speed is limited and this should be the reason that the CPU temperature is triggering the lower value for switching off from time to time. But with some load on the CPU the tempature is reaching directly the other trigger value again.

 

Could it be possible that something is wrong with the heatpipe or an thermal connection in my computer or is this normal???

 

 

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7256 Posts

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Re: Lenovo X270 noisy fan

2017-07-12, 0:01 AM

What is typical room temperature where you are using X270?

Are you on a dock, or in any other environment where airflow might be restricted?  Is PC sitting on hard surface like a table, or something else?

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22 Posts

05-04-2017

Switzerland

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Re: Lenovo X270 noisy fan

2017-07-12, 8:37 AM

Hi 

 

I tested the CPUID monitor but I did not get the temperature of the CPU, any ideas of other tools ?

 

After updating the Bios the laptop is quite noisy when the CPU goes over 15%... 

 

Lapotop is on docking station, but when is not on docking station is still similar. 

 

regards

d

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06-19-2017

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Re: Lenovo X270 noisy fan

2017-07-12, 17:02 PM

The laptop was placed on a table when I performed the test, environment temperature was around 23°C and the airflow through the device was completely free.

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7256 Posts

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  • Message 19 of 89

Re: Lenovo X270 noisy fan

2017-07-13, 17:27 PM

Tom139

 

In your most recent screenshot, I noticed that CPU speed is set as 2.06GHz (in Task Manager) at the time that the temperature is reported as 49C (in HWmonitor).  On the idle system, do you ever see the CPU speed decrease and stay at something lower than that?

 

We can't explain why your idle CPU temp stays so high but it seems to be the reason why the fan runs too much.

 

I guess it is possible there is a CPU heatsink problem on your specific unit...  

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  • Message 20 of 89

Re: Lenovo X270 noisy fan

2017-07-15, 11:23 AM

Okay.... And now????

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