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48 Posts

08-07-2019

Portugal

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Re: Bring back fan control to the Legion Y740

2019-09-12, 17:03 PM

Well, that's the whole point of this thread...

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97 Posts

09-13-2019

Finland

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Re: Bring back fan control to the Legion Y740

2019-09-13, 5:10 AM

New in forum, not native english speaker, so pardon my english.

 

Just bought Y540 and heat issue is on. 97c max heat while gaming. Temporalily solution is to use Vantage Silent mode. Could someone tell me what does it do? Processor heat goes down about 10c and FPS drops about 20-40 (Doom) still staying in over 100fps. Processor Watt readings are at about 35W when they are on other modes as high as over 77W. Fans are also very quiet.

 

And a question. Does cooling pad help on Lenovos? This one is the one I considered: https://www.overclockersclub.com/reviews/notepal_u3/

 

 

-A-J-
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100 Posts

06-01-2014

India

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Re: Bring back fan control to the Legion Y740

2019-09-13, 5:51 AM

Set CPU clocks to 3.4 GHz using Throttlestop. And if want more lower temperature then limit CPU power to 35W. Learn Throttlestop here https://youtu.be/N3v3o21M8gg. I use a portable table on bed instead of a cooling pad and it helps in cooling.

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97 Posts

09-13-2019

Finland

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Re: Bring back fan control to the Legion Y740

2019-09-13, 7:03 AM

Hmm. I think that Vantage Silent mode does actually limit CPU power to 35W. It still runs over 4GHz though.

 

I found out on short test with Doom, that on Performance or Balanced modes (not sure what they are called in English since I have the Finnish version of the Vantage software) lifting the backend of the laptop does drop (peak) temperatures 3-4c, but in Silent mode the drop was only 1c. In silent mode temperature peaked at 85c, balanced and performance at 94c (all with end lifted).

 

I really hope there will be a patch for this, so that we can use the whole potential of these otherwise great machines. I do not know, but started to think that is the reason for this whole mess just that simple that Lenovo has found out that fans will not last for 2 years (warranty time) if they are used maxed out? So they slow them down and count on that processor will last even if it peaks near 100c from time to time.

 

I would be happy if processor would be max 90c. Would not like to mess with Throttlestop, but just might have to...

 

 

-A-J-
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79 Posts

04-07-2019

Italy

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Re: Bring back fan control to the Legion Y740

2019-09-13, 11:18 AM

I don't think there will be a patch that totally solves the problems with temperature.
In my case, an undervolt of -135 and the use of the max fan function kept the CPU around 80/85 degrees constant without the need to reduce CPU power.

My advice is to use throttlestop anyway, because to achieve constant temperatures within 90 degrees you will likely need both an undervolt and the max fan function.

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37 Posts

08-07-2019

United States of America

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Re: Bring back fan control to the Legion Y740

2019-09-13, 18:32 PM

Im not sure why you guys are having troubles with temps.  Im running bf5 multipler 64player servers, on high/ultra settings at well well over 100 fps, usually its close to the max 144hz screen refresh rate and my temps never go above 80 degrees celcius on either cpu/gpu. This is my second y740 and they both have been thermally sound. 

 

I do use throttlestop undervolt and performance setting on fans with bios 1.06.  I do keep my machine off level surface with plastic sticky pegs on the back.  This machine does a well good job at removing heat from the machine.  Many gaming latptops only expell heat from two vents, we have 4 good vents.  Their are other laptops that expell air from 4 vents but many of them have cold spots or cold vents out of the 4 that will basically act as a passive vent as it does not do a proper job. 

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97 Posts

09-13-2019

Finland

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Re: Bring back fan control to the Legion Y740

2019-09-13, 20:09 PM

"Im not sure why you guys are having troubles with temps."

 

You just answered yourself to this. I have the latest BIOS, I do not have Throttlestop installed, and I would like my laptop to function out of the box like it should. If I would have wanted to tweak and adjust I would have bought computer parts and made a desktop machine for myself.

 

 

-A-J-
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11 Posts

08-10-2019

United States of America

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Re: Bring back fan control to the Legion Y740

2019-09-13, 20:33 PM

my answer after reading all that mess was MSI GE65, sorry if I've hurt someone's feelings

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67 Posts

04-17-2017

United States of America

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Re: Bring back fan control to the Legion Y740

2019-09-14, 1:34 AM

Id like to see the bottom cover removed from your laptop. They only way I could see air coming out of the 4 fin stacks would be putting something over the air bridge gaps where the fans meet the fin stacks. None of the three I have taken down have anything covering those gaps. I had pondered putting kapton tape over them to see if it would help get air through a bit better , but I'm also seeing those gaps create air movement within the bottom cover .

Also,Why they decided to put fabric over the bottom in-between the two fans has still baffled me. Removing it has netted better temps across the whole chassis. Unless it was part of the airing out of the under side of the motherboard. Which still wouldn't work great as they put layer of fabric tape across the Heatsinks themselves. Which just helps insulate the heatsoak.  

Taking it down, doing a proper TIM replacement, thermalpad replacement, removing all of the heat absorbing fabric (some engineer must have had a few too many that day) and sitting it on top of my modded Notepal with a fan controller and 3 120mm vardar fans nets temps that are decent for what is in the chassis hardware wise. 

And no, the fabric tape on the GPU heatsink provides NO help with mounting pressure ..Zero- pressure paper has confirmed this across 3 laptops and 4 Heatsinks for this model. 

Don't get me wrong I love both of my legions, but I shouldn't have had to do R&D on something I Paid this much for. And have pondered sending Lenovo a Bill for such. 

 

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4 Posts

09-14-2019

Belgium

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Re: Bring back fan control to the Legion Y740

2019-09-14, 9:23 AM

Hello, is the new bios update resolve the problem of heat ? 31ww ? or temperature falling ? 

Sorry for my english, i come from Belgium :) 

Thanks for your reply :) 

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