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

Sep 15, 2020 1:15 PM in response to Adxyal

Adxyal wrote:

Sad to see that Apple seems not to have given any answer for this issue that was identified back in previous decade !
Are you working on it? What is the plan? With Big Sur? can you at least give some information? roadmap?


This is a user to user forum and as such, Apple is not here.


Further, Apple doesn't announce plans or what they are or aren't working on.

Sep 17, 2020 1:30 AM in response to Dogcow-Moof

Because the modern top of the line product isn't doing what the ancient one did well? Would seem a pretty obvious reason. If an ancient one can connect to an external display without being noisy, we expect the modern one would too. Please William, why can't you accept that is natural. Why do you continue to try and justify this just because yours is working? Please, just feel happy that yours is and leave the others in this thread to try and work out how to fix our problem and discuss it. You have made your point many times - don't continue to do so. We've heard you, thank you. No more please.

Sep 17, 2020 2:51 AM in response to Dogcow-Moof

These comments are fairly amazing ! I have been a big fan of Apple computers for more than 25 years, but when they do something wrong, let's face it and ask them to things right!


As a consumer, and with a machine at that price, you can deserve to have :

  • a silent computer when you are not requiring much horse power and doing simple daily tasks
  • a powerful computer for heavy load tasks that you would need from time to time and in which case you can tolerate the fan noise


Anyhow - any advice is welcome - as far as I am concerned I have tried everything I could find and did not manage to make it silent with an external monitor... what would it take to give the option not to activate dGPU when you connect a monitor?



Sep 17, 2020 3:25 AM in response to silvann

silvann wrote:


William Kucharski wrote:

If faster clock speeds and higher capability were inseparable linked to more heat and noise my laptop should sound like a booster rocket compared to my first 16 MHz desktop computer.


It's through major thermal engineering decisions that it does not, and Intel and AMD have been working to keep power/heat down as best they can.


Sep 18, 2020 5:17 AM in response to Dogcow-Moof

That is accurate and I have to apologize but I must correct you‘re sentences. I am sure you agree to avoid the other user of this forum start believing your assertion that one cannot hear fans with 2‘400 RPMs. You can even easily hear it from 3 feet distance in a room with 33dB.


I feel sorry if you cannot hear even with your head on your MBP. I am sure it was powered on and running at that time.


No way to use with external displays for a broader audience.


What I still miss from you is constructive proposal how to tackle. With e.g. Xprores or external GPU or USB HDM displaylink adapter. To deny the issue is not yet helping to resolve.

Sep 18, 2020 11:24 AM in response to itunestux

itunestux wrote:

That is accurate and I have to apologize but I must correct you‘re sentences. I am sure you agree to avoid the other user of this forum start believing your assertion that one cannot hear fans with 2‘400 RPMs. You can even easily hear it from 3 feet distance in a room with 33dB.


I would wholeheartedly disagree, but really, unless you're in a recording studio most offices and homes have more than 33 dB of background noise at all times.


I feel sorry if you cannot hear even with your head on your MBP. I am sure it was powered on and running at that time.


Cute snark, yes, my head was on the MBP while it was playing HD video full screen on the Dell and viewing this forum and stubbornly refusing to drive the fans any faster because it was handling the thermal load just fine.


No way to use with external displays for a broader audience.


That's simply not true; several people have reported finding a combination that does not cause fan speedups, and others don't mind the fan noise.


I get you can't find a combination that works for you though.


To deny the issue is not yet helping to resolve.


I never "denied" the issue, but I will chime in when phrases like "there's no way" or "defect" are used, because they're inaccurate.


There have been several suggestions floated throughout this thread of actions to take, one of them being to use mDP if possible because HDMI is all but guaranteed to require the VRAM be driven at full speed.

Sep 18, 2020 11:50 AM in response to Adxyal

If your monitor has a mini DisplayPort connector, use USB-C to mini DisplayPort adapter and cable to connect from your Mac to the monitor.


There are many available; this is the one I used in my testing:


Amazon: USB-C to Mini DisplayPort Adapter, ITD ITANDA 4K Thunderbolt 3 to Mini DP Adapter Cable for Apple New MacBook 2017, ChromeBook Pixel Samsung S8(No Thunderbolt 2)


Sep 21, 2020 8:18 AM in response to TimUzzanti

I just bought a MacBook Pro (16-inch, 2019), with a 8-core i9, 32GB of DDR4 memory and an AMD Radeon Pro 5500M with 8GB. With nothing installed, as soon as I plugged it into my Samsung 24" monitor running at 1920x1200, the fans ramped up to maximum and stayed there. I can hear it in the next room.


I could use advice on what to do

1) I could wait for Big Sur. Does anyone running a beta version have feedback on whether this issue is fixed in Big Sur?

2) I could return it an get a similar machine with a 5600M. Does anyone have feedback on whether it has the same issue?

3) I could return it and go back to my 2017 MacBook Pro that doesn't have the issue even with two monitors attached.


Sep 21, 2020 10:22 PM in response to eindaj

If fans spinning at 2400 RPM are noisy to you so be it, but you also won't find any other high performance laptop that suits your needs.


"Heats up" depends largely upon your monitor and its connection method.


You make it sound like the issue is universal, and I (and others) have posted data that shows it is not.


If it bothers you and you are within the 14 day return period, feel free to return your machine for a full refund.

Sep 21, 2020 10:59 PM in response to dem107

Same here. 5000+ rpm just watching a twitch stream.

I've tried TB3, HDMI, and DP monitors. 4k, 2k, 1920x1080.

I can't believe this. SMDH. Unacceptable.


Watching the same twitch stream. The EXACT same twitch stream.

With the same monitor - on my 2015 MBP - whisper quiet.


I get it that the machine is more powerful. I accept and acknowledge

that faster silicon results in greater heat. I do not accept that watching

a simple streaming video on a 5 year old MBP is perfectly silent while my 2019 16" MBP

sounds like the deck of an aircraft carrier actively engaged with an enemy.

Sep 29, 2020 10:00 PM in response to TimUzzanti

I'm having the same issue. I had nightmare of contacting apple support and they are not helpful at all. Support engineers keep interrupting me and not listening at all.

After escalation I was requested to send laptop to their factory free of charge. But I'm not sure if apple will find something before.

I'll make sure to record couple of troubleshoot videos and share them on youtube before I send it.

Case: ***


[Personal Information Edited by Moderator]

Sep 30, 2020 12:02 AM in response to itunestux

You keep saying defective yet you refuse to listen to any of the reasons you are told why it is that way.


I understand that the solutions offered did not work with your configuration, but that doesn't mean they didn't work for others.


It's not playing down anything to note the issue isn't universal.


Interestingly enough, full throttle is exactly how modern computers and CPUs with "Turbo Boost" are designed - they run at as fast a speed as possible until they need to be thermally throttled. This provides optimal performance for quick bursty tasks at the possible cost of longer-lived ones.


Likewise AMD's explanation is they would rather have higher clock rates, meaning more power and heat, than risk ever presenting flicker to the viewer.

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MacBook 16-inch Fan Noise

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