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10 Posts

10-22-2019

SK

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Yoga S740 fan noise

2019-10-22, 8:58 AM

Hello.

 

Yesterday I´ve received my new Yoga S740 laptop and I was really looking forward to this laptop, but after using it for a day I am a bit disappointed with 2 things:

 

- Battery life - I have the UHD version so I expected it not to be so great but it is even worse than I thought. Only about 3-4 hours. But this is something I can probably live with, not like the second problem.

 

- FAN NOISE - even when doing simple tasks such as watching youtube videos or netflix, the fans start spinning and they are just loud. Sometimes it´s such loud that I am just waiting until the laptop starts flying around my room like a drone, because the fans sound like an airplane before taking off... When connected to a charger, the fans are almost constantly on.

 

Also, the CPU is always working on high %, and the dedicated graphics is constantly at 0%.

 

I have the 14 inch version, UHD 4K display, 16GB Ram, i7-1065G7, GeForce MX250.

 

If these things can be somehow solved, I would really be glad to know how.

 

Thanks!

 

 

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1810 Posts

12-13-2016

US

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Re: Yoga S740 fan noise

2019-10-22, 14:55 PM

Welcome to the Community.

 

If you've only had it for a single day, odds are it's simply updating. These days, any Windows machine has a ton of updating to do right out of the box. A lot of that happens in the background impacting use for hours or days. 

 

If it's been a couple of days and it's still maxing out, open Task Manager and see what's consuming the CPU. There could be a stuck installation program or some other process that's misbehaving. Come back and list anything that's suspect.  In the meantime, use Lenovo Vantage to update all of your drivers and BIOS. That often fixes a lot of things.

 

Doc


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I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo. I love beer.
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10 Posts

10-22-2019

SK

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Re: Yoga S740 fan noise

2019-10-22, 15:10 PM

Thanks for your answer.

 

I have updated absolutely everything after I started the laptop, so everything is showing as up-to-date.

 

So I doubt it´s because of that.

 

I am not using anything CPU intensive at the moment, the highest usage in the task manager is usually for Opera browser and that is at about 6-10%. 

 

Still the fan comes on randomly and loudly.

 

And it is almost constantly on when the laptop is connected to charger.

 

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4 Posts

10-22-2019

CA

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Re: Yoga S740 fan noise

2019-10-22, 16:42 PM

I have a Yoga 730 and it's been doing the same for the past week, AFTER I got it back from service center for a broken cpu fan.

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Re: Yoga S740 fan noise

2019-10-22, 16:56 PM

 wrote:

 

 

I am not using anything CPU intensive at the moment, the highest usage in the task manager is usually for Opera browser and that is at about 6-10%. 

  


In your first post, you seemed to indicate the CPU % was at or near maximum when the fan ramps up. Is this not the case? 

 

The fan will spin more frequently when connected to the charger as charging introduces additional heat into the chassis. 

 

Doc


____________________________________
I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo. I love beer.
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8 Posts

03-02-2018

DE

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Re: Yoga S740 fan noise

2019-10-23, 8:32 AM

Definately something wrong with your unit (I also guess it´s because of the initial windows updates and search indexing in the background), mine (FHD version) is absolutely quiet and the battery life is about 10-11 hours with mixed work.

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10 Posts

10-22-2019

SK

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Re: Yoga S740 fan noise

2019-10-24, 6:54 AM

Well of course it ramps up when the processor is at that high percentage, the thing is I am not starting anything with such CPU usage.

 

Now being the third day with the laptop - it also starts when the overall processor usage is at 10% and the fans start spinning like crazy...

 

 

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8 Posts

03-02-2018

DE

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  • Message 8 of 29

Re: Yoga S740 fan noise

2019-10-24, 6:59 AM

That´s weird, i´ve only heard the fan again after the initial Windows Updates on Day 1 when importing 2000+ photos in my Adobe Lightroom library. Honestly, I do not do intense tasks - only browsing in Chrome with 4-5 tabs, Spotify, WhatsApp/Telegram, Word/Outlook and some Lightroom/Photoshop stuff, but other laptops i´ve owned before were loud as crazy when surfing with 2 or more tabs open.

 

Overall I´m really impressed with this device, one of the best laptops i´ve used so far.

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  • Message 9 of 29

Re: Yoga S740 fan noise

2019-10-24, 12:34 PM

 wrote:

Well of course it ramps up when the processor is at that high percentage, the thing is I am not starting anything with such CPU usage.

 

Now being the third day with the laptop - it also starts when the overall processor usage is at 10% and the fans start spinning like crazy...

 

 


Doesn't matter what YOU'RE starting. It's the other processes and things that start automatically that could be consuming your CPU unnecessarily. Stuck installation routines, cloud services synchronization, backups, virus software updates and scanning. It's pretty easy for automatic processes to consume CPU without you personally launching anything. 

 

The fact the fan dies down at some point is promising. Now, you just have to dig through Task Manager to find the things that are either stuck or things you can change the settings for. If you spot a process you don't recognize, you can Google it to see what it is or post it here and we'll figure it out. 

 

Doc


____________________________________
I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo. I love beer.
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1 Posts

11-11-2019

SI

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  • Message 10 of 29

Re: Yoga S740 fan noise

2019-11-11, 22:33 PM

I just got mine and it's doing the same thing. I'm not doing anything, CPU percentage is really low and the fan is spinnig. It's not going crazy fast, but I can hear it way more than I'd like to. So I got core temp program  and it shows my temps at about 44-55 C. I guess Lenovo is just using a very steep fan curve? I don't know why? It's below 50 degrees. Even on my thinkpad, it tries to keep temperatures below 60C. I installed tpfancontron on my thinkpad and it doesn't go over 75 C and is very quiet. I can't wait to get something like that on this computer as well. Because it's just too loud for my liking. If anyone knows how to correct the fan curve on this computer, please let me know. 

 

P.S.: I also suspect that thermal paste in this laptop is crap. Because temperatures just jump up to 70 or 80 for half a second and then quickly drop back down to 60. 

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