MacBookPro 16-inch has current noise, cpu turbo frequency noise?

I found that during the use of the newly purchased MacBookPro 16-inch, such as opening large software and restarting the system, noisy sounds will be heard under the keyboard. Should be the noise caused by Intel CPU Turbo? Some in the community also said that it was noise from SSD read disks. It's strange to hear this kind of sound at night when it is quiet. Is it a quality problem? Is it normal? Does everyone's MacBookPro also have this current noise? Wait for your feedback, thank you. (My MacBookPro 16-inch is i9-9880H CPU and 1T SSD)

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Posted on Jan 1, 2020 5:52 PM

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Posted on Apr 4, 2020 2:01 PM

Model - MacBook Pro 16, Intel Core i7-9750H

The coil whine appears when there is a sharp high power supply to the processor.When the turboboost is turned on, the power is jumped to 80 watts and the squeaking is heard. If you turn off the turbo boost and run the test, the power will not rise above 40 watts and the coil whine will not be heard. For the load testing was used Geekbench. For power measurement, the Intel Power Gadget was used. Turbo Boost Switcher was used fo turn on/turn off turbo boost.Below images with measurement.

With turboboost on




With coil whine - turbo boost on


Without coil whine - turbo boost is off


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76 replies

Jan 4, 2020 5:42 PM in response to area3d

<<So, it seems that all this proves that this current noise comes from the CPU Turbo.It's the coil whine issue.>>


Saying that it is so does not make it so.


If you have an article written by reputable source that says otherwise, please cite it. Otherwise, you are talking unverifiable nonsense.


As I stated above that there is no high-voltage power supply in these computers. The Power Adapter generates 20 Volts DC, the battery generally stores about 12 Volts DC and the computer generally runs on 5 volts DC. None of this requires high frequency switching. There is no substantial coils inside to whine -- those are in High Voltage switching power supplies that take in 110 or 220 volts AC chop it up further, and rectify and regulate it back to a DC voltage.

Mar 7, 2020 12:10 PM in response to area3d

Same here, can hear this sound coming from under keyboard. For such an expensive kit this is weird. Can hear the sound even when all I m doing is browsing. Will probably be returning. Never had similar sound with my 2015 Macbook so regardless if it's loud SSD or not this makes no sense. Especially not for such an expensive machine.



Apr 9, 2020 6:40 AM in response to Song Peng

I think it's possible - it's necessary to reduce the difference between the frequencies as much as possible and then either the processor will work all the time at rest at higher frequencies (bad for battery life) or it will cut off the turbobust and then the processor will work at lower frequencies and will not overclock much (bad for performance).

Apr 5, 2020 4:04 AM in response to shpakdm

So Mac will wok slower in single core mode. So programs which in some places of execution(or they just constantly use one core) can switch to one core will work slower. Example with turbo boost off - geekbanch show nears in single core mode650 points, but with turboost is on - 1050 points so big difference for single core mode. But we can admit that many programs use single core mode - if we can hear sound - with the turboboost on, so turn off turbo bust is not an option because it reduces performance by almost half for one core.

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MacBookPro 16-inch has current noise, cpu turbo frequency noise?

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