MacBook 16-inch Fan Noise

We are testing two new 16-inch MacBook's before doing a rollout across our organization. Under low loads (25% cpu utilization), fan noise will get annoyingly loud. We're not doing any GPU related and more routine work such as: using web applications, debugging web pages, Microsoft Teams conferencing (audio/video) with a handful of people, Photos downloading from iCloud, Mac Mail downloading a new mailbox from Exchange.


We DID NOT notice this on our 2015 MacBooks and this might prevent us from continuing the 16-inch MacBook rollout in our organization.


Interested to hear others experiences.


Tim

MacBook Pro 16", macOS 10.15

Posted on Nov 21, 2019 11:34 AM

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Question marked as Top-ranking reply

Posted on Dec 23, 2019 9:27 AM

All,


We are kind of wrapping up all our testing and working with the Apple Business Team to figure out how we move forward.


This thread is getting a little side tracked with monitors and so I wanted to point out that these issues discussed are completely unrelated to brand/model of monitors being used. That said, it IS related to having monitors connected and the internal GPU within the MacBook, along with the CPU and the overall heat that both generate.


In our final testings, we did clean installs with 10.15.2 and primarily tested an eGPU using a Razor Core and a Radeon RX Vega 64 so we could eliminate the internal GPU in the MBP.


It became really clear the combined heat from the internal Radeon Pro 5500m GPU and the i9-9880G CPU is too much for the current thermal management system, especially when using all USB-C ports. (I.e., for power, USB-C hub, USB-C to Display Port video cables).  From all the testing and heat generated by the unit, it looks like our Radeon Pro 5500m GPU is fried because we are seeing artifacts on text (laptop display and external monitors) but not when we use the eGPU.


Just so you understand our configuration with the eGPU:  We have one USB-C Hub connected to the MBP and one USB-C cable connected to the eGPU.  The one USB-C cable to the eGPU is powering the MBP but also the eGPU has the two Display Port cable to the monitors.  Now the MBP has two free USB-C ports.  This was producing about 38 degrees less heat in Airflow on the MBP.


When the eGPU is connected, we can push the MBP to about 60% CPU for sustained periods before hearing the fans at about 4500 RPM. But as many of us have noticed, when we don’t have an eGPU, we’re seeing this at 5% to 10% CPU.


We have installed Parallels and ran Windows 10 on three monitors on separate space and have done Geekbench tests and a variety of stress tests with the eGPU and its operating normally.  


Bottom line, the combination of using the GPU and CPU is pushing the MBP into heat conditions causing the FAN issues and in our case, possibly damage to the GPU.  


Apple had a similar issue with the 2018 MacBook Pro and people were starting to stick their machines inside a Freezer to see if they could avoid the CPU’s from stepping down prematurely.


Hopefully Apple can find a solution because these new 16 inch MBP could be incredible.


Please start a support case with Apple so we can get this resolved sooner than later and it will also protect you a bit more if you need to return your units beyond the return policy. Moving forward, its all on Apple!


Tim

4,224 replies

Feb 24, 2020 11:19 AM in response to 10NewsPhotog

10NewsPhotog wrote:
...
I've never run an external monitor, but I just hooked my 4K TV to the AV Multiport, set it to 4K 60Hz...
...
...silent as can be, absolutely no fan noise. :-\


That IS an external monitor, as is a projector.


If you are NOT hearing load fans, that suggests there may be a Hardware problem with some of the Early samples of this product.


¿What version of MacOS?

Feb 25, 2020 12:56 AM in response to ahmedfromreservoir

ahmedfromreservoir wrote:

I once left mine with the fans blazing for a few hours plugged in and it was still blazing the fans, can’t be good for it 🤔


Why? That means the fans were properly cooling the interior to deal with the heat that was being produced.


If it had gone into thermal shutdown, that would have indicated something bad.


In this case the fans were keeping the interior from reaching the point of thermal shutdown - the very reason they are there.


Conventional desktop PCs are designed such that one or more interior fans are running whenever the system is powered on, and the same is true for most any PC graphics card featuring hardware as powerful as that on the MBP 16's logic board.

Feb 25, 2020 11:30 AM in response to fmorga

fmorga wrote:

I am coming also from a 2016 MBP without any issue. The defected MBP 16 inches with a terrible fan noise is useless.


Funny, I use mine daily and I love it, as do untold thousands of others, so I guess it's not quite "useless."


It has an issue where in a specific use case more heat than desired is generated and the fans ramp up to cool the device, and some people find that objectionable, I get it.


That might make it useless for you, but certainly not for many.

Feb 25, 2020 11:44 AM in response to fmorga

>>I am coming also from a 2016 MBP without any issue. <<


I had three 2016 MBP and had nothing but problems from the day they were opened and they all get sent back for various reason (one had the entire guts and screen replaced at no charge). Two got returned and I got a 2018 MBP. Then a 2019 15" and then a 2019 16". The 16" is by far the quietest for me when working on video and other heavy tasks and with dual 4k screens. I know from experience that you can get a bad one (or two or three).

Feb 25, 2020 4:51 PM in response to TimUzzanti

TimUzzanti wrote:

To make matters worse, Bootcamp is unusable (another marketed feature) and is throttled significantly compared to MacOS because Windows and its drivers aren't nearly as efficient as MacOS. Again, another symptom of a bigger problem. I have posted this previously; we use Bootcamp heavily on all previous MBP generations but have instructed all employees to not use it to avoid hardware issues until there is a solution.


Out of curiosity, why use Bootcamp as opposed to a virtualization solution like VirtualBox?


If you plan on using a single monitor, two monitors, three monitors or Bootcamp... all capabilities Apple markets to its consumers... you will hit thermal conditions that will impact your laptop performance and/or longevity.


Do you have proof of that longevity claim?

Feb 25, 2020 7:36 PM in response to Spinnn

Spinnn,


The statement you made:


When you open Logic Pro X with an 8-track project (nothing fancy, one or two plugins), CPU request frequency is 5 GHz (!) and so everything starts heating up..


thats exactly what Happens to me ..same number of tracks (nothing fancy, one or two plugins),


what I can’t understand is my old 2012 iMac 27” would run those same specs you without requesting a fan?




Feb 26, 2020 5:09 PM in response to DPJ

DPJ wrote:

"God forbid consumers make informed decisions about what they purchase."

You're confusing the proper word influenced with the word informed. And there are one or two people here who continually repeat themselves over and over in order to influence others.

Literally you and one or two other people who don't have issues (or even own the machine?) keep insisting everything is fine, doubting and questioning our claims while the rest of us are constantly posting video evidence, screenshots and links to other discussions online of people having problems.


This is the video I wish someone had shown me before I bought the laptop: https://www.youtube.com/watch?v=pJT660pUOMc


Sadly no one did so I made the video as total proof of how bad it is. This will inform potential buyers of the issues with the MacBook Pro 16".

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MacBook 16-inch Fan Noise

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