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65 Posts

04-27-2013

Greece

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  • Registered: ‎04-27-2013
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  • Message 11 of 13

Re: High temperatures on idle making computer noisy (L520)

2013-05-25, 6:41 AM

Sorry, I don't play any games and have no games to install and test

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65 Posts

04-27-2013

Greece

175 Signins

779 Page Views

  • Posts: 65
  • Registered: ‎04-27-2013
  • Location: Greece
  • Views: 779
  • Message 12 of 13

Re: High temperatures on idle making computer noisy (L520)

2013-06-02, 10:40 AM
Just a question, sorry if it sounds dense...

I have suspicions that for the increased fan noise two things could be at blame
- The processor, whose cores' temperatures differ about 5C
- The Sensor that controls the fan speed

Since the processor, despite exhibiting this weird behaviour (consistent and considerable differentiation of temperature per core), that could be pushing temps upwards, is not malfunctional, my attention turns to the FAn

Where is the fan sensor located? Is it possible that with a fan replacement the problem could be gone, or is it a motherboard thing?

Could it be the reading of the cpu temp? How is that read? Is it in the cpu?
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65 Posts

04-27-2013

Greece

175 Signins

779 Page Views

  • Posts: 65
  • Registered: ‎04-27-2013
  • Location: Greece
  • Views: 779
  • Message 13 of 13

Re: High temperatures on idle making computer noisy (L520)

2013-06-08, 10:00 AM

Well I have bought a Lenovo Thinkpad L520 laptop, I was very excited...great price and great quality and features.

 

But there is one thing that just prevents me from enjoying my purchase...the loud fan.

 

It starts spinning at about 40C - if the machine is cold, it may start spinning at about 45-47C - and will not stop even if temperature drops to 38C....

 

It seems the minimum rotation speed for the fan is 2800rpm...
That sounds a lot actually, but L520 only has one fan to do the work.

 

I have read other threads about fan noise and the problem seems to be twofold:

- at what temps (cpu / system) the fan will start spinning

- at what speed it will start spinning

- what are the rated dB by Lenovo for that fan at that speed.

 

Having read another very interesting thread for Thinkpad T530 (where the user recorded the fan starting to spin at 50C, then dropping the temperature, then rising again and setting the fan on operation) it occured to me that Lenovo might in fact have tackled that issue, by setting a very low threshold for the fan to start spinning

 

So I would like some clarifications by Lenovo Staff and some verification by other users if possible about the thermal behaviour of L520

 

Questions

1) At what temperature has Lenovo set the fan to start spinning for L520? Is this different for different machine types?

 

2) At what temperature has Lenovo set the fan sto stop spinning?

 

3) Can the fan operate below 2800rpm?

 

4) Is Lenovo using a single model for the fan, or severa, with different specifications, i.e. producing varying dB at the same spinning speed?

 

5) Has Lenovo set specific criteria for dB produced at 2800rpm, or has it rated all the fans it uses on L20 to adhere to some specifications on noise?

 

6) What can be done by Lenovo, or by us Users, to decrease the noise of the fan?

 

7) Does Lenovo Service issue replacement for heatsink-fans for L520 laptops which seem to produce a lot of noise?

 

 

Please provide some info. I love my L520, but its baseline noise is a lot for me to take and may end up selling it, which would be a shame.

 

Moderator Note; subject edited; post merged in

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