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61 Posts

08-27-2019

Egypt

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  • Message 11 of 83

Re: Y540 concerned about temperatures

2019-09-12, 12:50 PM

Jarrodtech's review also showed similar results, but he had a 1660ti on his unit (Initially made me write off this laptop)

I'd recommend undervolting and underclocking using throttlestop if you already haven't.

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97 Posts

09-13-2019

Finland

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Re: Y540 concerned about temperatures

2019-09-19, 17:06 PM

A bit concerned yes. On the other hand, laptop works perfectly, so I wonder should I just forget the temps? My testbench has been 2016 Doom game and the highest temp on CPU has been 98c° and also my GPU maintains much cooler, only at about 70c°. I have a 31WW BIOS and I have not done any changes to the system. So it runs like factory means it to run. I just bought a Cooler Master U3 Plus cooling pad, but have not tested it yet. Tomorrow is a test day with and without fans.

 

I have found out that with Silent mode on Vantage temps stay at much lower levels, only at 84c° and still Doom fps is over 100. I think that this mode lowers the wattage to somewhere round 35-45W, but not sure. With BioShock Infinite fps stays on Silent mode at 144fps, but temps are only 83c°.

 

So my answer for now is the Silent mode. I hope they bring back the Max Fan, but until then... We have two choises. One is to take all potential out of the machine and just let it peak near 100c° and the other is restraining the beast in ways we find suitable, so that it stays under 90c°.

 

Edit: I have a i7-9750H / 32Gb / GTX2060 version.

-A-J-
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97 Posts

09-13-2019

Finland

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Re: Y540 concerned about temperatures

2019-09-20, 7:54 AM

OK, did some testing with Cooling pad and Fans under CPU part of the laptop. It did not do that much. CPU max temp with Performance mode dropped about 4c° (max was 93c°) and with Balanced about 3c° (Max 94c°). Since I dont have any program to measure average temps I do not know are they much lower. Results without the fans (just pad, which lifts the rear up) were almost the same so I think that they dont do much. Maybe if it would be hot in the room they could be more usefull.

 

On Silent mode there was no drop for temps at all. Max was 81c° which is a good result, since the game (Doom) still runs with full graphics levels and FHD resolution over 100fps speeds, many times at 144fps. Doom is the heaviest game I have now, so I will keep using silent mode and cooling pad, but I think I dont use fans for now.

 

Max wattage with Silent mode has been little over 51W and CPU runs max at 4,1GHz.

-A-J-
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47 Posts

08-28-2019

Germany

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  • Message 14 of 83

Re: Y540 concerned about temperatures

2019-09-20, 7:56 AM

I think our temps are just a bad paste job. Try repasting it using a thermal paste like Kryonaut, and it should be fixed.

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97 Posts

09-13-2019

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Re: Y540 concerned about temperatures

2019-09-20, 8:02 AM

 wrote:

I think our temps are just a bad paste job. Try repasting it using a thermal paste like Kryonaut, and it should be fixed.


This is just a couple of weeks old laptop and under warranty so can't do that. Laptop also works just fine, it does not crash with games or anything so I think that it just is designed to go that high temps. And with Silent mode temps are ok anyway.

-A-J-
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47 Posts

08-28-2019

Germany

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  • Message 16 of 83

Re: Y540 concerned about temperatures

2019-09-20, 8:05 AM

So it's not designed that way. The temps are normally in the high 70s range when pushing it. I even contacted Lenovo again and this time, they said it's a fault. Also, you can notice there are only 1-2 cores that get this high temperature, this is due to the bad paste job.

 

Also Lenovo said, I can repaste it by myself and it won't void the guarantee, as long as no damages occurs. So as long as you don't use liquid metal or electrical conductive paste you will be fine. You can ask them if that is true in your country as well. 

 

Also silent mode drastically reduces power draw and fans, meaning your CPU can't clock so high and your GPU will get hotter. 

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97 Posts

09-13-2019

Finland

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Re: Y540 concerned about temperatures

2019-09-20, 8:34 AM

 wrote:

So it's not designed that way. The temps are normally in the high 70s range when pushing it. I even contacted Lenovo again and this time, they said it's a fault. Also, you can notice there are only 1-2 cores that get this high temperature, this is due to the bad paste job.

 

Also Lenovo said, I can repaste it by myself and it won't void the guarantee, as long as no damages occurs. So as long as you don't use liquid metal or electrical conductive paste you will be fine. You can ask them if that is true in your country as well. 

 

Also silent mode drastically reduces power draw and fans, meaning your CPU can't clock so high and your GPU will get hotter. 


I disagree. All my cores are hot, for example on performance settings cores temps maxed like this:

0 - 96

1 - 87

2 - 92

3 - 94

4 - 90

5 - 91

 

And on Silent mode CPU runs at same GHz than it does on other modes. GPU heat with other modes has been at 66-71c° and with silent mode actually always at 63c° so it runs cooler on silent mode. And I did not see much difference on fps with silent mode.

-A-J-
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97 Posts

09-13-2019

Finland

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  • Message 18 of 83

Re: Y540 concerned about temperatures

2019-09-20, 8:41 AM

Here are pics of the heats etc.

 

First with balanced mode, no cooling pad.

https://www.dropbox.com/s/5t5h0f62guqwn6b/Heat_Doom_VB_Lifted.png?dl=0

 

Second with silent mode and cooling pad (max fanspeed on pad).

https://www.dropbox.com/s/4xw0o5pgtwduo8s/Heat_Doom_VS_CM_FanMax_002.png?dl=0

-A-J-
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61 Posts

08-27-2019

Egypt

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  • Message 19 of 83

Re: Y540 concerned about temperatures

2019-09-20, 12:53 PM

The 9750H and 9300h are hot CPUs, no one can argue with that.

Most laptops with these CPUs thermal throttle whenever you push the CPU so I don't think that lenovo are doing a bad job of cooling the CPUs, although the i5 should fair a bit better due to fewer cores and threads.

Btw, Silent mode limits the CPU wattage to 25 watts PL1 so that's why it doesn't heat up as much, but due to that it won't clock as high nor will it push the fans.

For anyone having thermal issues, use throttlestop undervolt+underclock and that should do the trick.

As for lenovo, I hope they bring some sort of manual fan control to their gaming laptops at least, my laptop is fine as is but my experience can be a lot less stressful when I'm not monitoring my thermals constantly.

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97 Posts

09-13-2019

Finland

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  • Message 20 of 83

Re: Y540 concerned about temperatures

2019-09-20, 13:03 PM

 wrote:

 

Btw, Silent mode limits the CPU wattage to 25 watts PL1 so that's why it doesn't heat up as much, but due to that it won't clock as high nor will it push the fans.

 


I you sure about this? HWMonitor says that my cpu goes to 4,1GHz and uses about 51W with Silent mode.

-A-J-
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