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8 Posts

11-02-2019

NL

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Re: Yoga C940 4k - Fan runs constantly

2019-11-09, 19:42 PM

intelligent cooling switches between the 2 basic profiles based on movement (or possibly laptop/tent/tablet mode.
if the machine is on a flat stable surface then intelligent mode switches to performance mode... if moving/handheld it goes to cool&quiet.

the ONLY way to get the fans to run less on a flat surface is to disable intelligent and select cool&quiet.
for the techniclly inclined..  the C&Q mode sets the PL1 Powerlimit to 9W (clock 1.1Ghz) and the PL2 Powerlimit to 25W, the Perf mode sets them to 28W and 44W.  The C&Q will try to keep cooling passive (limit the fans) The power slider then adjusts turbo parameters.

But imgo the basic problem is the idle temperature...  mine runs at 50C minimum (CPU package). I'm reading that a Dell XPS13 2-1 with same specs runs at 33C when idle...   Design flaw or simple (bios) tweak?

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25 Posts

08-06-2015

DE

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Re: Yoga C940 4k - Fan runs constantly

2019-11-11, 10:14 AM

Had a call with Lenovo . They Sayed I should replace the device and that not all devices should have this issue.

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2 Posts

11-11-2019

US

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  • Message 13 of 143

Re: Yoga C940 4k - Fan runs constantly

2019-11-11, 20:38 PM

Hi UHD owners, have you tried to lower the display resolution in Windows? Do you still experience the fans running constantly?

 

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8 Posts

11-02-2019

NL

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  • Message 14 of 143

Re: Yoga C940 4k - Fan runs constantly

2019-11-12, 11:23 AM

can't and it wont be of any use. it's the CPU settings (TPL/EPP) which are too agressive for the hardware.

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8 Posts

10-15-2019

SG

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  • Message 15 of 143

Re: Yoga C940 4k - Fan runs constantly

2019-11-12, 15:34 PM

I don't have this problem.  Have used for about 1 month. But maybe my fan is not working and I don't even know (don't think I ever heard it turned on before)!  That would be worse.  I have short battery-life problem instead.

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25 Posts

08-06-2015

DE

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  • Message 16 of 143

Re: Yoga C940 4k - Fan runs constantly

2019-11-12, 17:09 PM

 wrote:

I don't have this problem.  Have used for about 1 month. But maybe my fan is not working and I don't even know (don't think I ever heard it turned on before)!  That would be worse.  I have short battery-life problem instead.


Really ??? How odd .. Or are you always listining to music while you use it :) Can you run some hardware intensive stuff like a 3dmark test or anything.. This is really insane that you dont ever hear the fans. Which model do you have? 

 

Mine got quiter strangly .. i dont know why . Maybe the hardware adpats with usage.. It is very strange :) 

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8 Posts

11-02-2019

NL

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  • Message 17 of 143

Re: Yoga C940 4k - Fan runs constantly

2019-11-12, 21:29 PM

My loud and hot beast is now resetting before going back to Lenovo. Pity the beauty had a fatal flaw. And support is completely useless. Bye Lenovo, I won't be back. 

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20 Posts

10-15-2019

FI

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  • Message 18 of 143

Re: Yoga C940 4k - Fan runs constantly

2019-11-13, 11:28 AM
Mine has gotten a bit quieter too. One thing I changed was that I turned the Intelligent Cooling off, but I kept it on Performance setting. I did this change while the fans were running and they immediately stopped. I put the Intelligent mode back on and the fans soon started again. So it seems like Intelligent Cooling is doing something more intelligent than just switching between Performance and Cool and Quiet.

One thing different also is that I started using the new chromium based Edge browser instead of Chrome. It looks like this new Edge consumes less power than Chrome and prevents the temperatures to rise. Not really a real solution but if it helps, why not. Now that I'm writing this message, I haven't had the fans on at all.

This laptop is growing on me and I'm happier with it than in the beginning.
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20 Posts

10-15-2019

FI

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  • Message 19 of 143

Re: Yoga C940 4k - Fan runs constantly

2019-11-13, 11:35 AM
Actually, there was an update to Lenovo Vantage. The whole application looks now completely different. Maybe they changed something related CPU/fans? Because one thing I suddenly realized was that HWMonitor is now showing idle temperatures between 38-40 degrees and I feel that the bottom of the laptop is now cooler than before.
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20 Posts

10-15-2019

FI

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  • Message 20 of 143

Re: Yoga C940 4k - Fan runs constantly

2019-11-14, 13:36 PM

I spoke too soon. Fans go on still pretty easily. On battery power I'm already pretty happy but when it is plugged in, the fans run almost all the time.

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