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20 Posts

07-10-2018

Poland

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

2018-07-23, 18:31 PM

Did you noticed that on the battery all works fine? Processor stays cool, no fans, and processor will raise mhz only if it needed up to 3 MHz. And there is no any 98% of processor dicreasing.

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15 Posts

05-21-2018

Poland

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

2018-07-23, 20:28 PM

Concerning Ralph-Wiggum  benchmark , it is  wired , in my test CPU Single Thread with power at 98 %  reach max 190 points   and with 100% power 290 points .  There is much less decrease  when it comes to multi thread CPU test ,  980 points vs 1280 .  Both test done on battery only .

 

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5 Posts

07-21-2018

United States of America

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

2018-07-23, 20:37 PM

What benchmark program are you using? I conducted all three benchmark tests while the computer was plugged in; not sure if it would change if using the battery. I'll try that tonight.

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20 Posts

07-10-2018

Poland

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

2018-07-23, 20:38 PM
Try with power adapter please
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15 Posts

05-21-2018

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

2018-07-23, 20:42 PM

http://www.benchmark.pl/aktualnosci/cpuid-cpu-z-pobierz-download-aplikacja-dane-cpu-apu.html

 

download ,  CPU-Z zip file .  

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15 Posts

05-21-2018

Poland

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

2018-07-23, 20:47 PM

With power adapter the same scores 

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20 Posts

07-10-2018

Poland

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

2018-07-23, 21:00 PM
Peteros, I see that you are in Poland too. Can I kindly ask you to contact with lenovo support team as I did?
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15 Posts

05-21-2018

Poland

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

2018-07-23, 21:43 PM

That's  pointless job  ,  once I  had almost the same issue with compaq , never had been solved .First Lenovo must rebuild whole boost scenario with more accurate smooth  fans speed. I do worry it is not going to happen . More likely they will release  new model  since  they already stated :"everything is ok ". Nobody would have use a such statement  , if hadn't had in mind to suppress whole matter . Apart of above , if someting is design to work in given temperature must be chilled somehow. I have also  bigger laptop HP 17 "with the same processor , the fans strat to work with  much more delay after boost  and much more smoothly, but ther is more space inside .

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5 Posts

07-21-2018

United States of America

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

2018-07-24, 3:29 AM

A quick update: I ran the same benchmark tests (PC Mark 8 Home benchmark) as I did last night, this time without the laptop plugged in (i.e. on battery). I got much the same result before; the main difference is that the results with the 75% fan speed were even closer to the full power than before:

 

A) 100% processor power, no limit on fan speed: benchmark score of 2449

B) 98% processing power maximum, no limit on fan speed: benchmark score of 2367 (~97% effeciency)

C) 100% processor power, fan speed limited to 75%: benchmark score of 2426 (99% efficiency).

 

It seems at least the task tested by this benchmark aren't much affected by either fan reduction option. I haven't tried the gaming benchmarks yet, as those tests can run up to 2 hours each, so you may see a bigger difference there. But for the tasks I mainly use my laptops for, these seem like a not-ideal but workeable solution. I still have 13 days before I need to decide whether to return the computer, so I'll try to keep track of how often I actually notice the fan.

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2 Posts

07-26-2018

United States of America

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

2018-07-26, 12:36 PM

I bought my 14" 720s (i7-8550U, MX150, 16GB, 512GB SSD) about a month ago, same fan issue. I made some of the recommended changes in this thread and so far my issue seems to be resolved.

 

1. Set power profile to "Balanced"
2. Set your max power processing to 98%. I have not experienced any efficiency loss in browsing or with load intensive applications like premiere pro. I've heard this has no effect if your power profile is set to "performance". My testing appears to back this up.
3. Set power settings to passive
4. Remove lenovo explorer but keep vantage
5. Deleted OneDrive and Adobe updater via task scheduler

 

I opened Chrome and Premiere Pro to put it under load. Did some video editing and did not experience any fan noise at all for approximately 20 minutes. Was very quiet. Ran through video editing like a hot knife through butter. No loss of effienciency. The fan kicked in at approximately 55 degrees but it was slow and measured. No spiking or cycling, just a steady low fan that was barely noticable doing a normal job of trying to cool. Very comfortable. Closed Prem Pro and left Chrome open, did some browsing and after about 8 minutes, the fan turned off to whisper quiet and did not hear the remainder of the evening. Now I've got the laptop I always wanted.

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