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2 Posts

12-27-2018

Denmark

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Re: Ideapad 720S-14IKB fan noise/cycling

2018-12-27, 20:17 PM

If anyone is interested in creating a solution for this problem, It might be worth taking a look at creating a config file for NoteBook FanControl: 
https://github.com/hirschmann/nbfc/wiki

 

There is a pretty detailed guide on how to create a config for a specific laptop. I myself couldn't figure how to, properly because I don't know programmering, but I was able to find the EC the IdeaPad 720s-14IBK uses:
Nuvoton NPCE388NB0DX 2631M0182 632ACFC

 

I hope there is someone in this thread that knows how to program, and is able to create a config file for NoteBook FanControl.

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17 Posts

03-01-2018

Sweden

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Re: Ideapad 720S-14IKB fan noise/cycling

2018-12-27, 21:25 PM

How did you find the EC model? I'm trying to find it for the 520s model

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2 Posts

12-27-2018

Denmark

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Re: Ideapad 720S-14IKB fan noise/cycling

2018-12-27, 21:53 PM

RE arthurprs

 

I was able to find it, by opening the laptop and looking for the EC. You might be able to look at a disassembly and write down the EC model from a picture or video.

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14 Posts

05-16-2018

Sweden

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Re: Ideapad 720S-14IKB fan noise/cycling

2019-01-01, 14:24 PM

Found a new bios update (Vantage) for my model:

Model: ideapad 720S14-IKB
Serialnr: #########
Productnr: 80XC
Old bios: 4VCN46WWV2.12

New bios: 4VCN48WWV2.14

 

 

Mod's Edit: Serial number removed from public view to protect member from its unwanted use.

Machine Type Model  80XC0010MX

 

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2 Posts

01-04-2019

United Kingdom of Great Britain and Northern Ireland

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Re: Ideapad 720S-14IKB fan noise/cycling

2019-01-04, 15:37 PM

Hi guys, I recently got one with an i7-8550u quite cheap secondhand and I've been playing around tweaking it. Obviously the first thing I noticed was the noisy fan. I've scummed through much of this thread and after applying a few fixes I've now managed to get it to be completely quiet until it hits 70 degrees. I haven't tested it out for too long, but it works after both sleep and restart. 

 

Here's what I did:

1. Updated everything through Lenovo Vantage as well as downloading the BIOS update manually. 

 

2. Set up throttlestop and undervolted the CPU. I managed to get a stable -135mv on core/cache and -80mv on iGPU and system agent. This didn't solve my fan problem, but it did bump up my cinebench score to 650, as well as reducing overall thermals produced causing it to hit 70 degrees later on. Throttlestop is a bit bad in that you need to setup a task scheduler task for it to start with Windows, I have however a guide posted here on another forum if you want to do so.

 

3. Set the Control Panel Power Plan options(just search "Edit Power plan" in the start menu to get there) to:

  • Intel Dynamic Platform and Thermal Framework Settings: Both to 18.8W @ 1.80Ghz
  • Processor Power Management: Both to passive

4. [Most important] Notebook Fan Control:

  • Download it, and use the config for "Lenovo Yoga 2 13"
  • Edit the config and set your "Critical Temperature" to when you want the fans to kick in

Note: As mentioned by other members we lack a specific profile to the 720s. The Lenovo Yoga 2 13 config seems to keep the fans completely idle until it hits the critical temp and then they start at 100% and gradually turns down as the PC cools down. I find this acceptable as the passive cooling seems to be pretty good meaning you'd only hit 70 degrees during high loads. The PC might hit the crit temp during startup and shutdown but should quiet down quickly.

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2 Posts

01-16-2019

United States of America

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Re: Ideapad 720S-14IKB fan noise/cycling

2019-01-16, 6:07 AM

LazerCut-

 

You are awesome.

 

I'm going to try out your methods and see how they work for my model. I'm familiar with overclocking desktops but had not realized Throttlestop allowed us to change voltage settings on our 720s. 

I look forward to undervolting, testing stability, and then setting up a fan speed that isn't so unbearable. 

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2 Posts

01-04-2019

United Kingdom of Great Britain and Northern Ireland

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Re: Ideapad 720S-14IKB fan noise/cycling

2019-01-16, 11:15 AM

Glad I could help :) 

 

I had to decrease my core/cache undervolt to  -120mv as I was having some bluescreens in some games even if I ran Prime95 stable for half an hour. It still means I'm able to keep a consistent 4-core turbo boost of almost 3Ghz tho. I don't think undervolting System Agent does anything btw, according to some sources it might cause instability due to faulty sensor readings.

If you wanna squeeze some more power out of your system you could look into overclocking the dGPU in MSI afterburner as well, I haven't had too much time with it, but it does seem like theres' some headrooom in overclocking the GPU, especially on the memory clock part. I'm going to test out stability at some point when I find some time. 

 

Also remember that its the Notebook FanControl fix that actually alters the fan profile. Hope you're able to get the fan under control mate :)

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1 Posts

02-01-2019

Sweden

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Re: Ideapad 720S-14IKB fan noise/cycling

2019-02-01, 12:12 PM

I have the same issues with my Lenovo 720s 8th i7. So annoying. I hope it will be fixed soon enough.

 

DISOPPOINTED!

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1 Posts

01-29-2019

United Kingdom of Great Britain and Northern Ireland

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Re: Ideapad 720S-14IKB fan noise/cycling

2019-02-01, 23:35 PM

I spent some time with this!

 

What worked for me is the software Notebook Fan Control like above helped alot.

 

I also stripped the laptop only around 12 screws and your in! I couldnt belive the amount of thermal paste! it was all over the chip and leaking onto the board both CPU and Graphics!  so I cleaned it all off with alchol wipes and put a pea size on both and started to put it back together. 

 

Then i noticed that the vents on the base of the laptop its pretty much blocked up with really tight hairy mesh and a plastic bee hive like mesh. so i decided to blow through it and it actually sounded like a high pitched noise through the mesh! so I risked it and took the hairy mesh off but left the plastic bee hive mesh above both fans.

 

Now my cpu runs at 38 degrees instead of 45 and is dead silent!!! i mean nothing!!! however there is still a small bug that when it gets to 50 degrees, the fans go full speed but the difference is not high pitched whining and just loudish air flow (this is in a silent room) and its not annyoing anymore. 

 

Hope that helps!

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4 Posts

02-02-2019

Germany

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Re: Ideapad 720S-14IKB fan noise/cycling

2019-02-02, 11:42 AM

I currently have the following notebook: Lenovo Ideapad 720S-15IKB.

 

I don't know if it's been mentioned here yet, but the fans can be controlled with the program NoteBook FanControl and the "Lenovo Ideapad 710S" profile. I only run one fan at 3.3% (Real 8-10%). The device always stays cool and very quiet. The fans can also be turned off completely.

 

I also set the core, GPU and cache voltages to -0.150,4 V with ThrottleStop and made other smaller settings. Thus it runs even cooler and more economically.


After a long search finally a device with enough power for me and fan control. Maybe it is also possible for the 14 inch.

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