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P52 thermal throttle after hitting 25%

2018-08-14, 1:53 AM

I bought my P52 as soon as it was released. When it arrived I noticed it was aggressively using the fans to cool itself, but only after installing a monitoring tool did I come to see that the CPU would jump almost immediately to 97/98C whenever the laptop was under any significant load (20-25%). When idle, temps hover between 60-70C.

 

Is this normal? Is there a way I can contact Lenovo to see if there's an issue?

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38 Posts

04-03-2018

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Re: P52 thermal throttle after hitting 25%

2018-08-14, 5:55 AM

Install Intels XTU (Extreme tuning utility) from thier download page 

 

 

https://downloadcenter.intel.com/download/24075/Intel-Extreme-Tuning-Utility-Intel-XTU-

 

You should try under volting the CPU,,, this will not affect speed or performance it will just reduce the heat load a little.

 

guide here

 

https://www.custompcreview.com/articles/undervolt-laptop-boost-battery-life-reduce-heat-quiet-fans-guide/

 

plenty of good youtube how-to also

 

https://www.bing.com/videos/search?q=intel+XTU+undervolt+tutorial&view=detail&mid=8EF78FC10195A5BFDEB08EF78FC10195A5BFDEB0&FORM=VIRE

 

Also check your BIOS power settings and your power settings in Windows settings utlity. Set for balanced.

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Re: P52 thermal throttle after hitting 25%

2018-08-14, 14:01 PM

Undervolting or reducing available performance is not an acceptable solution. Are you telling me that all P52 laptops have the same issue I am having, and Lenovo has not addressed it?

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10-03-2011

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Re: P52 thermal throttle after hitting 25%

2018-08-14, 15:14 PM

If you ignore the temperature reading (100% loading of a single core will heat it up, surely), does it actually throttle? In other words, if you load CPU alone for a minute or two, does it continue to run with "Turbo" CPU frequency or with "Base" frequency?

 

Overall, P52 is not supposed to throttle with CPU load alone, and previous generations didn't.  https://www.notebookcheck.net/A-performance-comparison-of-all-new-ThinkPad-notebooks.286486.0.html

 

If it does, I'd contact Lenovo warranty.

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Re: P52 thermal throttle after hitting 25%

2018-08-14, 15:31 PM

There is a margin on power demands for CPU as I noted and the articles point out under volting does not make the CPU run slower all it does is take down that power margin to a point where it runs less hot (unlike your temper). 

 

I am not a Lenovo representative or tech support, you can take my suggestion or not. I am not responsible for your situation.

 

I Have a P50 undervolted and over clocked i7-6820HQ CPU that has been repasted with high quality thermal paste it runs at 80-85 at full load. I am sure that even if you are the unluckiest loser on the silicon lottery you can improve your performance. Also changing the power options does not really reduce your performance, it just reduces power demand when the cpu doesn,,'t need the boost, ,keeping the CPU ,cooler when it doesn,'t need to be doing the work.

 

I am not telling you anything only going through the proceess which would be considerable easier if you actually posted the specs of your machine as per the forum etiquette.

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Re: P52 thermal throttle after hitting 25%

2018-08-14, 23:12 PM

Using a synthetic benchmark or stress test will cap the CPU at 3.9ghz (i7 8850H) and 97C. I can allegedly (according to XTU) hit 4.3ghz for a second or two tops before the thermal throttle indicator shifts to 'Yes' and the CPU speed drops. I guess I will contact Lenovo

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33 Posts

09-24-2017

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Re: P52 thermal throttle after hitting 25%

2018-08-27, 10:42 AM

im reading this and cant believe!

i dont know if yaall working for lenovo or get kickbacks for saying those things, THIS KIND OF STUFF SHOULD NOT HAPPEN ON A NEW LAPTOP

undervolting?! bios settings ? monitoring tools?

when do u admit that this machine is a waste of $$$

i bought the P51  with xeon processor, threw in 64GB of ram, from day one having issues, , fan on high speed, im so so so dissappointed with this machine which was supposed to KO all others

and dont get me wrong , im a huge lenovo fan! , i own a second laptop, X1 carbon ,cant say enough how good it is, but the Ps? no!

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3 Posts

08-17-2018

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Re: P52 thermal throttle after hitting 25%

2018-08-28, 5:44 AM

First of all, all of 8th gen 6core processors gonna experience either thermal throttle or power limit throttle due to being a 6core processor. People often misunderstand that turbo clock as sustainable operation clock, which is partially true if you have enough cooling solution. Also, with intels stock power limit(45w), your processor will probably hit that power limit on its base clock.

 

As long as it doesnt run below base clock (which is 2.7ish on 8850h i believe), i dont see any issue. What lenovo did on p52 line is that they unlocked the power limit (short burst for 78w and 55w after 28 sec) so processor can run faster and thats why it will run hot. I personally own a p52 xeon version, which have higher clock than what you have, it hit temp throttle as well, however it is just nature of how intel 8th gen cpu runs(which is really suck).

 

Ps. I observed that fan curve on p52 is really passive, it wont kicks in unless you hit around 90 i believe. So, undervolt or just turn off the turbo boost. Personally, I turned it off and max temp i get on normal usage is 70c ~80c. And even prime 95, it barely touchs 90c

 

Admin note; post edited to avoid potential offence to others

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Re: P52 thermal throttle after hitting 25%

2018-08-30, 21:34 PM

What you're saying is wrong, I thought everything was fine until I got in contact with people who had run the same benchmarks with the same settings as me with significantly cooler temps.

 

 

I contacted lenovo and they told me to send it in. It's now been a few weeks with no word since the 21st. So now I have work piling up and no computer. Definitely learned my lesson here with buying direct from lenovo as I've spent more than others for a defective machine

 

 

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08-17-2018

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Re: P52 thermal throttle after hitting 25%

2018-08-31, 14:30 PM

its not.

 

everychip(same model) has different voltage table so everychip has different thermal behavior, as other person mentioned up there, it is called "silicon lottery". However, if you ask me if it is acceptable to get hotter chip than others, then my answer would be  it is totally up to you. I basically told you common 8th gen issue, lenovo's turbo profile and what turbo boost clock is, I dont know how you ended up saying you are wrong.

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  • Message 11 of 24

Re: P52 thermal throttle after hitting 25%

2018-08-31, 15:13 PM

Because it's not relevant. No matter how you slice it, the product was defective and Lenovo is fixing it. 

 

Intel would go out of business if properly cooled chips were threatening to self destruct just by opening a web page.

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08-17-2018

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  • Message 12 of 24

Re: P52 thermal throttle after hitting 25%

2018-08-31, 15:29 PM

well I'll stop wasting your time then 

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36 Posts

01-15-2018

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Re: P52 thermal throttle after hitting 25%

2018-09-14, 1:25 AM

can someone please post an XTU chart for their P52 with Xeon processor?  I attached mine, and I would like to compare if possible  

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Re: P52 thermal throttle after hitting 25%

2018-09-20, 3:51 AM

Anyone?  I am looking for the first 2 minutes for a XTU cpu stress test on a P52 with Xeon.  I published my results, and I would like to compare them if possible.

 

Thank you very much,

alex

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8 Posts

09-20-2018

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  • Message 15 of 24

Re: P52 thermal throttle after hitting 25%

2018-09-20, 9:10 AM

Your not alone alex

 

Last stress test i reach 100°C on CPU core measured with CPUID HWmonitor and XTU and when finish temp stay close from 70°C

 what is a normal temp for this kind of CPU in idle ?

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05-30-2009

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  • Message 16 of 24

Re: P52 thermal throttle after hitting 25%

2018-09-20, 13:14 PM

I wish someone with strong technical knowledge would explain what defines normal usage and what is abnormal usage.  On my part, I don't think I see a problem with my P52. Most of the time, my CPU sits at 50-60C package temperature.   I ran two tests which you can see in the image below.


The first test has the Core Voltage Offset to 0.000V.  In this case, the Max Core Frequency tends to hover below the 4.0 GHz line and the average Package Temperaure seems to average below the 90C mark.

 

The second test has the Core Voltage Offset set to -0.100V.  In this case, the Max Core Frequence tends to hover closer to the 4.0 GHz line (in one case, it stuck to the max freq) and the average Package Temperature seems to average similiar but peak higher.

 

I don't think any setting is statiscally telling.

 

Comments ?

 

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  • Message 17 of 24

Re: P52 thermal throttle after hitting 25%

2018-09-20, 15:42 PM

I think you are correct.   Can you please post a screenshot of all the settings?  For some reason my setting might have gotten corrupted.  I reloaded the default profile but i am not sure is the deault profile for the xeon processor.  I tried uninstalliing the xtu but after reinstall it picks up the prior custom setting...  Thank you.

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  • Message 18 of 24

Re: P52 thermal throttle after hitting 25%

2018-09-20, 17:41 PM

Here are my settings for my Xeon E-2176M  processor.

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  • Message 19 of 24

Re: P52 thermal throttle after hitting 25%

2018-09-20, 18:29 PM

Thank you.  yes, I was on the phone with Intel and they said that this utility cannot be used with this processor because it is not supported--compatible.  I think it has to do with the CPU being locked, not sure....

 

They sent me to this forum (said I am on my own :-), and they talk about that issue. 

 

https://communities.intel.com/message/531444#531444

 

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  • Message 20 of 24

Re: P52 thermal throttle after hitting 25%

2018-09-21, 0:25 AM
Not sure I believe the comment from Intel. Although Intel's web site does not actually have a compatibility list of processors for XTU, they definitely list "high-end mobiles processors".
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Re: P52 thermal throttle after hitting 25%

2018-09-21, 3:06 AM

These people are not very technical, all they do is a search on their site to see what they can find. 

 

Anyway, I was able to restore the values as they were originally defined, thank you!

 

 

 

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