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100 Posts

06-01-2014

India

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Re: Y540 concerned about temperatures

2019-12-22, 17:02 PM

Yes underclocking is the only solution for y540 poor CPU cooling. Use Throttlestop for underclocking, add it to taskbar so just one click on desktop will launch the Throttlestop.

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94 Posts

09-13-2019

Finland

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Re: Y540 concerned about temperatures

2019-12-25, 7:17 AM

 wrote:

Yes underclocking is the only solution for y540 poor CPU cooling. 


Is it really? How much more efficient the laptop is when underclocked versus when on Quiet mode? I play my games on quiet and temps stay reasonably low also on CPU and framerate is high enough. So I still think that using quiet mode is another solution and I would really like to see 3D mark results on underclocked machines so that we could compare underclocking and quiet mode.

 

Quiet mode is also easier to use for normal user.

 

-A-J-
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9 Posts

12-22-2019

Romania

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Re: Y540 concerned about temperatures

2019-12-25, 8:00 AM

Quiet mode simply doesn't allow turbo boost to kick in so it stays at stock frequency. That's the only way for the fans to stay quiet.

While that may be enough for less demanding games, it certainly isn't for the latest AAA games, at least if you're aiming for smooth 60+ fps.

So if the fan noise doesn't bother you, but the temps do, and you still want to play at 60+ fps, then the only solution is to undervolt + underclock.

 

I've did some further tests the other day and have found that with an undervolt of -0.145V (both core & cache) and underclock to a max. of 3.1 Ghz, you can keep the temps between 64-68C, while maintaining smooth 60+ fps in AAA games such as Cod MW, The Witcher 3, Jedi Fallen Order etc).

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94 Posts

09-13-2019

Finland

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Re: Y540 concerned about temperatures

2019-12-26, 14:18 PM

 wrote:

Quiet mode simply doesn't allow turbo boost to kick in so it stays at stock frequency. That's the only way for the fans to stay quiet.

While that may be enough for less demanding games, it certainly isn't for the latest AAA games, at least if you're aiming for smooth 60+ fps.

 


And what does that "stock frequency" mean really? With Quiet mode CPU on my laptop gets up to 4,4Ghz, is that much less than underclocked and volted CPU? 

 

I would really like to see those standard 3D mark demo tests so we could see how much faster Y540 is with underclock/volt compared to stock one on Quiet mode. None of my games go under 60fps. Some stay on about 70fps and older ones keep well over 100fps, some even at 144fps.

 

-A-J-
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5 Posts

12-29-2019

United Arab Emirates

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Re: Y540 concerned about temperatures

2019-12-29, 16:47 PM

yo dude i also have the same problem with my lenovoy545 i just bought it like 1 week ago and its already thermal heating dunno what to do really lol like my cpu reaches the temp of 95c and thats it like i would imagine what would happen to this laptop after 1 year or so lol

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47 Posts

08-28-2019

Germany

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Re: Y540 concerned about temperatures

2020-01-01, 13:31 PM

Quiet mode is counterproductive since it lowers the fan speed by an insane amount, while only lowering TDP to 25 watts (it also does not disable turbo boost like the other poster states) 

 

The system fans are not able to dissipate heat from both GPU and CPU at 25 watts at that low speed, meaning temperatures, especially on the GPU side (since that one still runs at full speed) will get very high and reach GPU throtteling pretty fast, meaning you will loose a lot of performance.

 

I also found out that undervolt+underclock is the best way to get good temperatures while having great performance (I tested many scenarios, gaming in CPU limit, high framerates and video editing/blender and the underclock from 4 to 3.5 GHz does not have a big impact on performance at all). Maybe 4 FPS at best while playing at high framerates such as 120 FPS. No difference under 90 FPS. 

 

If you want my honest opinion, those thermal modes are a failure. I would suggest keeping it on balanced. 

 

 

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94 Posts

09-13-2019

Finland

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Re: Y540 concerned about temperatures

2020-01-02, 8:12 AM

 wrote:

Quiet mode is counterproductive since it lowers the fan speed by an insane amount, while only lowering TDP to 25 watts (it also does not disable turbo boost like the other poster states) 

 

The system fans are not able to dissipate heat from both GPU and CPU at 25 watts at that low speed, meaning temperatures, especially on the GPU side (since that one still runs at full speed) will get very high and reach GPU throtteling pretty fast, meaning you will loose a lot of performance.

 

If you want my honest opinion, those thermal modes are a failure. I would suggest keeping it on balanced.  

 


I still disagree. My GPU has never seen higher temps than about 65c° while on quiet mode. I tested 3D Mark tests with Quiet and Performance mode and the differences in GPU temp are minimal.

 

For example Time Spy test difference on score was 550 points (better for performance mode) and difference in fps was on GPU test less than 1fps and on CPU test round 8fps.

 

So the Quiet mode compared to Performance mode has actually no effect on GPU performance or heat, but some on CPU.

 

Max GPU heat on Time Spy and Performance mode was 65c° and on Quiet mode 63c° so actually also the GPU stays cooler while on Quiet mode.

 

I have done some testing before with games like Doom and FarCry3 and also just looked those results and found out that atleast on my laptop the worst mode for GPU heat is the Balanced mode. On that GPU has reached temps up to 71c° which has never happened when on Quiet or on Performance mode. I dont know why, and I dont know if this is just my laptop, but in my case the Balanced mode is the worst one.

 

So my advice is still, until we get Max Fan back, to stay on Quiet mode. You will loose some FPS but keep those temps down.

-A-J-
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47 Posts

08-28-2019

Germany

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Re: Y540 concerned about temperatures

2020-01-02, 9:35 AM

Try rebooting the system when you chose Quiet Mode. Only then it applies the lower fan speed (it's pretty buggy). If you hear your fans ramping up in quiet mode, then it's not working, period. Because the point of quiet mode is... well to stay quiet!

 

 

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100 Posts

06-01-2014

India

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Re: Y540 concerned about temperatures

2020-01-02, 10:06 AM

Yes the BIOS is pretty buggy, on balanced n performance too after sometime the fans don't ramp up. The solution is going in BIOS n exit discarding changes. This makes fans behave normal.

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94 Posts

09-13-2019

Finland

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Re: Y540 concerned about temperatures

2020-01-02, 14:02 PM

 wrote:

Try rebooting the system when you chose Quiet Mode. Only then it applies the lower fan speed (it's pretty buggy). If you hear your fans ramping up in quiet mode, then it's not working, period. Because the point of quiet mode is... well to stay quiet!

 

 


If it would not be In Quiet mode why would there be different results, temps and watts while testing on 3D Mark? I dont have any problems switching profiles. Never had. Quiet mode is more silent than the two others, but it is not really silent while gaming.

 

My laptop is usually always on quiet mode and I almost always shut it down when not using it. So it starts too on quiet. 

-A-J-
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