Welcome to our peer-to-peer forums, where owners help owners. Need help now? Visit eSupport here.

English Community

Gaming – Lenovo LegionGaming Laptops
All Forum Topics
Options

9 Posts

07-24-2019

United States of America

16 Signins

53 Page Views

  • Posts: 9
  • Registered: ‎07-24-2019
  • Location: United States of America
  • Views: 53
  • Message 1 of 83

y540 heat and BIOS issues

2019-07-24, 14:18 PM

There's been widespread discussion online about the newest BIOS for the Legion line causing heat spikes and thermal throttling. Many people are going back to an earlier version of the BIOS, or undervolting.

See:

https://www.reddit.com/r/Lenovo/comments/c7zk00/psa_do_not_update_y740y540y545_bios/

https://www.reddit.com/r/GamingLaptops/comments/cfxx90/lenovo_y540_thermal_throttling/

https://www.youtube.com/watch?v=ebjMXj-LGh4

https://www.youtube.com/watch?v=umCepbFlIWk&t=920s

etc...

 

An excellent guide to combat some of these issues here:

https://www.reddit.com/r/GamingLaptops/comments/cdsp2m/lenovo_y540_i7_9750h_gtx_1660ti_ultimate/

 

I received my new laptop a week ago, and it had an older BIOS on it (21WW). Specs: 17" y540 with rtx2060. I checked with Premium Care, and they are looking into why it came with older BIOS. Also, I do NOT want to upgrade to the 28WW, clearly its messed up the thermals for the Legion line and people are discussing best ways to downgrade to the 27WW.

 

I was going to use Throttlestop and MSI Afterburner to fix some issues I was having. My laptop spiked and throttled under heavy load (PUBG, etc). I've gotten spikes as high as 97c, but laptop runs cool at normal load. Before I do all that, I wanted to make sure about the BIOS issues, and if undervolting was suggested by Lenovo Customer Care. Because it hasn't been discussed on this forum, Lenovo knows nothing about any of this, it's all new to them.

 

Anyone experiencing thermal issues and fixing them with undervolting? 

 

Reply
Options

100 Posts

06-01-2014

India

78 Signins

675 Page Views

  • Posts: 100
  • Registered: ‎06-01-2014
  • Location: India
  • Views: 675
  • Message 2 of 83

Re: y540 heat and BIOS issues

2019-07-28, 5:54 AM

yes no max fans will lead to increased temperatures while heavy games. Until max fans return by bios update the workaround is using balanced thermal mode in vantage software, undervolting cpu to -140mV in throttlestop and elevating the rear of laptop 1-2 inch with object like eraser etc for airflow. And if want more lower temperatures limit the cpu tdp/turbo power limit to 40W in throttlestop.

Your cpu will still be 3.9Ghz all cores with 40W limit so no loss of performance. Balanced thermal mode limits tdp to 45W, performance mode increases tdp to 50-60W so more temperatures. Manually setting 40W tdp is the sweet spot unless max fans return by lenovo

Reply
Options

9 Posts

07-24-2019

United States of America

16 Signins

53 Page Views

  • Posts: 9
  • Registered: ‎07-24-2019
  • Location: United States of America
  • Views: 53
  • Message 3 of 83

Re: y540 heat and BIOS issues

2019-07-28, 10:43 AM

Thanks for the reply. I took an old earbuds case from Apple and used that to lift the rear of the laptop about 1/2 inch, and it does help the airflow. I have a couple of questions about your throttlestop settings. 

 

- Do you click the Speed Shift - EPP button?

- Do you undervolt the CPU Core and CPU cache equally?

- is resetting the tpl to max 40 the only thing you changed on that screen?

 

I'll try these until the issues with the BIOS are fixed. Thanks again.

Reply
Options

9 Posts

07-24-2019

United States of America

16 Signins

53 Page Views

  • Posts: 9
  • Registered: ‎07-24-2019
  • Location: United States of America
  • Views: 53
  • Message 4 of 83

Re: y540 heat and BIOS issues

2019-07-28, 11:13 AM

One other thing. The opolar air cooler seems to help a lot. With the increased ventilation from lifting the rear of the laptop - and increased cool air flow. Have you used a device like this... that is more of a vacuum style cooler?

Reply
Options

100 Posts

06-01-2014

India

78 Signins

675 Page Views

  • Posts: 100
  • Registered: ‎06-01-2014
  • Location: India
  • Views: 675
  • Message 5 of 83

Re: y540 heat and BIOS issues

2019-07-28, 12:28 PM

Unchecked speedshift EPP

Checked bd prochot, speed step

Core -200, cache -130 UV

Both short n long power boost Max is 40 in TPL settings, clamp checked in long power n unchecked in short power Max.

Check these settings n manually raise the laptop rear then u might not need a cooling pad

Reply
Options

9 Posts

07-24-2019

United States of America

16 Signins

53 Page Views

  • Posts: 9
  • Registered: ‎07-24-2019
  • Location: United States of America
  • Views: 53
  • Message 6 of 83

Re: y540 heat and BIOS issues

2019-07-28, 13:37 PM

Thanks! I’ll try these. 

 

The opolar isnt really a pad. It’s like a mini air conditioner that attaches to the side of the laptop and pulls air into the laptop, like a vacuum. Since I’m near an AC unit, it really pulls in that cold air and I’m seeing nice drops in temps when on. It’s a bit loud - but the ambient noise from the AC is louder, so it’s great. Check it out. Very good unit for the y540 I think. 

Reply
Options

11 Posts

09-19-2019

Saudi Arabia

22 Signins

132 Page Views

  • Posts: 11
  • Registered: ‎09-19-2019
  • Location: Saudi Arabia
  • Views: 132
  • Message 7 of 83

Re: y540 heat and BIOS issues

2019-09-19, 22:53 PM

hello

 

thank you for this .. its true the bios is causing this i downgraded my bios to bhcn27ww.exe

 

and thats the link https://drivers.softpedia.com/get/BIOS/Lenovo/Lenovo-Legion-Y540-17IRH-BIOS-Update-BHCN27WW-for-Windows-10-64-bit.shtml

 

and this my warning video

https://www.youtube.com/watch?v=iCilC0jOV58

Reply
Options

1 Posts

09-29-2019

Mexico

1 Signins

18 Page Views

  • Posts: 1
  • Registered: ‎09-29-2019
  • Location: Mexico
  • Views: 18
  • Message 8 of 83

Re: y540 heat and BIOS issues

2019-09-29, 16:06 PM

Hi, I was thinking about to buy the opoplar vacuum cooler for my y540 17", but I'm wondering where's the best place to install it? And how many of them would I need?

 

Regards


 wrote:

Thanks! I’ll try these. 

 

The opolar isnt really a pad. It’s like a mini air conditioner that attaches to the side of the laptop and pulls air into the laptop, like a vacuum. Since I’m near an AC unit, it really pulls in that cold air and I’m seeing nice drops in temps when on. It’s a bit loud - but the ambient noise from the AC is louder, so it’s great. Check it out. Very good unit for the y540 I think. 


 

Reply
Options

9 Posts

07-24-2019

United States of America

16 Signins

53 Page Views

  • Posts: 9
  • Registered: ‎07-24-2019
  • Location: United States of America
  • Views: 53
  • Message 9 of 83

Re: y540 heat and BIOS issues

2019-09-29, 16:39 PM

It fits snuggly over the left side vent, right along side the usb plug. Only one unit is needed. Sucks in a LOT of air if you set it 10 or above. It’s a bit loud but I don’t mind, when the fans spool up on the laptop it’s about the same. Helps my rig by a few degrees. 

Reply
Options

5 Posts

10-07-2019

India

20 Signins

82 Page Views

  • Posts: 5
  • Registered: ‎10-07-2019
  • Location: India
  • Views: 82
  • Message 10 of 83

Re: y540 heat and BIOS issues

2019-10-31, 12:55 PM
Mate,Mistakenly Updated TO 32WW,Any Idea How To Downgrade it.27WW Was Way Better,With Zero Throttling On Games,Now Even For AC Syndicate d Thermals D Spiking.
Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete

X

No, I don’t want to share ideas Yes, I agree to these terms