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08-14-2014

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W540 palm rest up to 48 degrees celcius?

2014-08-14, 17:48 PM

I'm considering buying the W540 but according to the following article, the left palmrest gets up to 48 degrees celcius under load. If this is the case, the notebook becomes unuseable under load when you are using the notebook keyboard  Is the article correct?   

 

Article

http://www.notebookcheck.net/Review-Update-Lenovo-ThinkPad-W540-20BG001BGE-Workstation.115048.0.html

 

 

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599 Posts

02-24-2014

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Re: W540 palm rest up to 48 degrees celcius?

2014-08-16, 15:20 PM

Dunno, but my left palm rest is cool, and a non issue.  BUT, I do 'try' to use my W540 as a Workstation with workarounds.  For work purposes, even in Lightroom and other graphic applications, the nVidia is not taxed.

 

However, since the design of the W540 seem to be a terminal to watch videos, I could feel the video chip getting warm.  I did a stress video and number crunching test, and indeed it does get rather warmish/hot. If the W540 engineer's aim was to play video games, it's a kludge.

 

I'm not worried for my work applications. Never go hot for me.  I do not do video editing on the machine, but since video editing is a slow process, the heat problem is inconsequential.

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02-15-2015

NL

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Re: W540 palm rest up to 48 degrees celcius?

2015-02-15, 14:54 PM

I received my W540 2 days ago, and the left palmrest indeed gets uncomfortably hot.

I am considering sending back the PC, because it is very uncomfortable. Maybe turning off the nvidia video card might help, I will try that first.

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01-02-2010

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Re: W540 palm rest up to 48 degrees celcius?

2015-02-15, 17:15 PM

Right now, I am sitting in a cool room - temperature is 70F or about 20C.  I have an infrared thermometer and I am running intel's CPU torture test on my fully loaded W540 (quad core, 32gb memory)  The right palmrest is 20.9C, and the left palmrest is 26.8C.  The CPU core temp goes up to about 82C, and then the fan gets louder and the temperature falls back into the high 70's.  The intel program tests the CPU only.  I then ran furmark to test the GPU.  The left palmrest got to about 38.5C - warm, but not hot.  (a little warmer than body temperature).  GPU temp hit 80C and then the fan got louder and it dropped to the mid 70's for the rest of the test.

 

BTW, 5 minutes after the torture test is done, the CPU temperature is back into the 40's and the pamrest is about where it was.  BTW, my testing was done while the machine was docked, and I haven't tested temperatures on the W540, but for other machines, they tend to run a degree or two higher under load in a dock.  My assumption has always been that the dock blocks some air flow from the fan.


Rich


I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.
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Re: W540 palm rest up to 48 degrees celcius?

2015-02-15, 18:25 PM

Thank you for responding, Richk.

I put my W540 to sleep, to let it cool down. When I turned it on, after some time (the screen shot below says more than two hours, but it was more like 20 minutes) the CPU utilization has not gone up further than 3 to 4% on average. The left palmrest is 35 degrees, measured with an infrared thermometer. It feels uncomfortably warm. This is strange, as CPU temerature is comparable to what you measured.

 

hot2-29.png

 

I started up some processes that kept the CPU 'busy' between 10% and 20% load. CPU temperature went up to mid- to high-60s, and the palmrest was now 37 degrees.

 

hot3-03.png

 

Previously, after copying a bunch of files which did not at all torture test the CPU, the temperature of the palm rest was a even higher.

 

I am thinking that the heat might be generated by the GPU (although its temperature when the screenshot was taken was 43 degrees, and it wasn't doing anything), or by the upgraded CPU (i7-4810MQ).

 

Several years ago I had a Lenovo laptop which had a similar problem. After several months of working, it had affected the muscles in my left hand, and I had to stop using it. Therefore I am now inclined to return this laptop immediately.

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9644 Posts

12-27-2009

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Re: W540 palm rest up to 48 degrees celcius?

2015-02-15, 19:45 PM
Do you have a platter HDD? Maybe the drive is getting warm?

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
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Re: W540 palm rest up to 48 degrees celcius?

2015-02-15, 20:32 PM

No, I have the 512GB SSD, which I assume should not heat up.

There is also 16GB RAM, some of which has never been used yet, as I have the machine for 2 days now.

 

 

Thanks a lot for responding!

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Re: W540 palm rest up to 48 degrees celcius?

2015-02-15, 22:58 PM
SSDs can heat up too, especially given their rate of transfer. Try HWMonitor to get all available temperature sensors.

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
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Re: W540 palm rest up to 48 degrees celcius?

2015-02-15, 23:03 PM

The hard drive is in the center, left-to-right. I think the only thing on the left is the memory. Which GPU do you have? I have the K1100m.  Please note that I said that to me, 38.5C was warm and not too hot.  You thought 35C was uncomfortably warm.  Human body temperature is 37C


Rich


I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.
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Re: W540 palm rest up to 48 degrees celcius?

2015-02-16, 8:00 AM

Hello Richk, thanks for taking the time to help me sort this out.

 

My GPU is a NVIDIA Quadro K2100M (2GB VRAM).

My monitoring software indicates that it is quite cool (43 deg.) and not doing a lot.

 

Maybe my thermometer is not the best for meauring surface temperatures. Yesterday I worked on the laptop for maybe 2 hours, and I can still feel a tingling sensation in the side of my hand which rests on the palmrest.Maybe it is actually warmet than 37 deg.

I had this before with another Lenovo laptop, and after a few months I could not work on it any more.

 

I appreciate your help, but today I am going to contact Lenovo to send this unit back.

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