English Community

Lenovo NotebooksLenovo IdeaPad 1xx, 3xx, 5xx & 7xx, Edge, LaVie Z, Flex Notebooks
All Forum Topics
Options

9 Posts

06-07-2019

CL

11 Signins

118 Page Views

  • Posts: 9
  • Registered: ‎06-07-2019
  • Location: CL
  • Views: 118
  • Message 211 of 224

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

2019-10-09, 17:35 PM

Does anyone has an update on this? I have the lenovo Ideapad 720s- 14IKB and my fans goes mad sometimes, being a really unestable computer. Does anyone have a solution? I have tried everything but it doesn't shut up

Reply
Options

6 Posts

12-08-2017

NO

29 Signins

311 Page Views

  • Posts: 6
  • Registered: ‎12-08-2017
  • Location: NO
  • Views: 311
  • Message 212 of 224

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

2019-10-09, 21:26 PM

I have the same PC, and would recomend installing ThrottleStop using this link: https://www.notebookcheck.net/How-to-Lower-Temperatures-Stop-Throttling-and-Increase-Battery-Life-The-ThrottleStop-Guide-2017.213140.0.html

I undervolted it -105.5 mV, and have a profile "Balanced" where Speed Shift - EPP is set to 128 which is quite quiet, and a quiet profile where also turbo is disabled to make it very silent. (Also a battery profile with EPP 160 and a performance profile with EPP 32.)

With ThrottleStop, the PC becomes more powerful and quieter, so I'm happy with the computer.

Reply
Options

9 Posts

06-07-2019

CL

11 Signins

118 Page Views

  • Posts: 9
  • Registered: ‎06-07-2019
  • Location: CL
  • Views: 118
  • Message 213 of 224

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

2019-10-10, 10:06 AM

Thank you for the reply!

Just some doubts about the ThrottleStop... It doesn't damage your CPU because controlling the temperature, fans and all that stuff? And after creating those profiles your computer went silent and doesn't sound as much as before?

Thank you very much

Reply
Options

6 Posts

12-08-2017

NO

29 Signins

311 Page Views

  • Posts: 6
  • Registered: ‎12-08-2017
  • Location: NO
  • Views: 311
  • Message 214 of 224

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

2019-10-10, 10:39 AM

In options under alarm label i have set DTS to 20 and GPU to 78, to use profile "quiet", wich means if the CPU  reaches 80C or GPU reaches 78C throttlestop changes to the quiet profile which causes the temperature to drop. So overheating should not be a problem, and this temperatures I have only seen while gaming. ThorttleStop dosen't directly control the fans, but lower the temperature thus the fans become quieter. I followed the guide I linked to quite closely and think it's wise. No doubt the computer is quieter now. I see someone says a clean install of windows can help too, but i have not tried that.

Reply
Options

9 Posts

06-07-2019

CL

11 Signins

118 Page Views

  • Posts: 9
  • Registered: ‎06-07-2019
  • Location: CL
  • Views: 118
  • Message 215 of 224

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

2019-10-10, 11:51 AM

Perfect, all right I will try Throttle Stop and see how the computer goes. I have done several clean windows install and the fans still go crazy oftenly, so no success with that

Reply
Options

16 Posts

09-07-2012

US

20 Signins

129 Page Views

  • Posts: 16
  • Registered: ‎09-07-2012
  • Location: US
  • Views: 129
  • Message 216 of 224

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

2019-12-17, 20:36 PM

I undervolted to -105.5 and the fan noise/cycling went away to a great extent. However, on running userbenchmark, the cpu percentile went down to about 35% (meaning 35 percentile of all the tests for the same cpu done on the site). Making it 0 brings back to the 55%.

 

I am wondering if we are sacrificing the cpu processing power a lot by undervolting...

Reply
Options

0 Posts

02-18-2020

US

1 Signins

10 Page Views

  • Posts: 0
  • Registered: ‎02-18-2020
  • Location: US
  • Views: 10
  • Message 217 of 224

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

2020-02-18, 14:33 PM

Hi all

 

I have been following this topic for a while and fan noise has been an issue ever since I got my machine (Lenovo 720s-14ikb 81BD) in late 2018, but it has gotten significantly worse recently. My fans would ramp up to 100% doing basic things like opening Chrome. Turbo was hardly ever engaged.

 

I have experimented with all of the suggested solutions (NBFC, 98% power limit, Throttlestop), but my breakthrough came from fully cleaning the fan assembly and reapplying the thermal paste. This has significantly reduced fan noise for me. Here is my process:

 

0. Fresh install of Windows (may be optional but I did this as part of my initial efforts)

1. Install required drivers - Nvidia, Intel, etc.

2. Open laptop and remove fan assembly

3. Clean chips and heatsink with alcohol wipes - the original thermal paste was dried and looked over-applied and was spread outside the edges of the heat spreaders of the chips

4. Blow whole fan assembly with compressed air (maybe key element). I found a lot of packed in dust inside the fan blower. Also blow out all vents and openings

5. Reapply thermal paste, I used Noctua NT-H2 here and it came with included alcohol wipes

6. Reassemble laptop

 

When I rebooted the difference was immediately noticeable, the fan noise was reduced significantly and does not ramp up to 100 on opening applications. I benchmarked before and after using Cinebench and my results are as follows. Note my power settings are set to defaults, with the exception of switching between passive and active cooling setting.

 

  • Before with Passive Cooling enabled:
    • Idle temp: 40 c
    • Max temp: 64 c
    • Cinebench score: 804
    • Average clock under load: 1797 MHz
  • Before with Active Cooling enabled:
    • Idle temp: 40 c
    • Max temp: 64 c
    • Cinebench score: 871
    • Average clock under load: 1797 MHz
  • After with Active cooling enabled:
    • Idle temp: 37 c
    • Max temp: 59 c
    • Cinebench score: 1083
    • Average clock under load: 2495 Mhz

This solution I have found to be the most effective in my personal case. I could probably squeeze more performance out using NotebookFanControl and Throttlestop, but I am happy to leave the configuration as default as possible. I also dual boot with Ubuntu and the results are similar on there too.

 

Reply
Options

2 Posts

01-16-2019

US

4 Signins

18 Page Views

  • Posts: 2
  • Registered: ‎01-16-2019
  • Location: US
  • Views: 18
  • Message 218 of 224

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

2020-02-18, 15:19 PM
Hi alextea-



Did you use a particular tear-down guide for disassembly? How hard was it to get the needed components apart to get to the CPU and GPU (I assume you did both) to re-apply better thermal paste?



I've been thinking about doing this myself but haven't because I remember how big of a pain it was to do this with my last laptop...
Reply
Options

0 Posts

02-18-2020

US

1 Signins

10 Page Views

  • Posts: 0
  • Registered: ‎02-18-2020
  • Location: US
  • Views: 10
  • Message 219 of 224

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

2020-02-18, 15:50 PM

Hi dqniel

I mainly used the User Maintenance Manual available on the Lenovo support page for the machine (here) page 42 being most relevant. Also insidebylaptop here provides a good visual guide - steps 19 and 20.

 

Removing the fan assembly was surprisingly simple, removing the 8 securing screws and disconnecting the 2 fan headers - my main concern was stripping one of the screws so be careful there. Once the screws are removed a bit of force is needed to release the assembly because of the holding force of the thermal paste. There are cables routed around the fan assembly so remember to move those and replace them where they were before - maybe take a picture to remember

 

I had recently upgraded the RAM so I was more comfortable opening up my machine

Reply
Options

2 Posts

01-16-2019

US

4 Signins

18 Page Views

  • Posts: 2
  • Registered: ‎01-16-2019
  • Location: US
  • Views: 18
  • Message 220 of 224

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

2020-02-18, 15:57 PM
I appreciate the help. That doesn't sound too bad at all. Getting into my last laptop involved a lot of prying of plastic tabs and stuff that I was always afraid would break.

Entry via screws is much preferred.
Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete