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

Jun 8, 2020 4:39 PM in response to Dogcow-Moof

I don’t know any Rossman I and I don’t care about who is pro or anti Apple. I sure will test it out as soon as I can. I am just trying to think along with posters in this topic when reading about their findings.


William Kucharski wrote:
I don't care about CPU temps either, for the same reasons.
For example, if the fans were at full blast whether it's driving one or four monitors, it's no big deal.

ive only known you for a couple of pages, but this sounds very awkward to me. I am a working professional trying to make a living as a photographer. I know for sure that I would be bothered enormously by full blasting fans while creating my wedding albums for my clients. To me that would be a very big deal. It would be a deal breaker kind of deal. This is about getting things done, not arguing if the tech is within spec or not. What you are saying doesn’t make sense to me, sorry. My opinion of course.

Jun 8, 2020 5:09 PM in response to eindaj

If you or others here want to spend time calculating what fan speeds you think the fans should be running at in order to reduce temperatures to what you feel is more appropriate, that's fine. Several people have done just that and I salute their work and the effort they've put in.


However, the fact that the machine may run hotter than you like, may draw more power than you deem proper or the fans run or run louder than you would like do not in themselves mean the machine is either broken or defective.


That's all I have been stating in these posts; if your preferences for how you want the system to run are different than Apple's, you can either try to convince Apple to change how they set up their systems or purchase something else - I don't work for Apple, it doesn't affect me one way or the other.


If you need absolutely silence when creating your albums, I can get why the fans would annoy you if it interferes with your concentration; I've known photographers who prefer to have speed metal playing at 110 dB while working, so it's all a matter of personal style. 😁


To be perfectly fair, this is also why Apple offers a 14 day return period on purchases; not every machine will be a good match for everyone.

Jun 8, 2020 5:14 PM in response to Dogcow-Moof

I think you are correct. However...


Assuming the fan behaviour discussed above is as designed (As you argue) is an even much more astonishing thought than Assuming the machines are defective.


in fact I believe odds are that all these machines are not hardware defective. That would be very coincidental. So I believe you are right. Which only leaves the option of a serious design flaw, either in hardware or software or both.


this puts me off most, as it implies that the issues won’t be solved anytime soon.

Jun 9, 2020 3:43 AM in response to Dogcow-Moof

William Kucharski wrote:

Once again you are calling a machine defective for not meeting your particular expectations of what it should and shouldn't do despite it never being promised anywhere in any Apple specification or ad that it can do what you want it to.

"Imposter?" That doesn't even make sense.

I design electronic devices, including embedded computers.. In 2020 if I design a device that cosumes 18W or more to just drive a 1080p, everybody ridicules about me.. I will be an entertaiment subject in the companiy.. Adding that if I make that maching unnecessaryly thin that cannot cool itself, I will be fired!


There is NO point in defending this.. If due to Apple, driving HDMI consumes 18W, than either Apple does not now electronics/software, or it is an imposter..


If due to Apple this is normal, I'll not buy any of its products unless I have to.. What about loggin in with user root with empty password? Is it normal?

Jun 9, 2020 11:41 AM in response to denizcan

I think you devote a lot of time chastising Apple for things that are for all we know explicit design decisions.


I personally would much rather have the GPU and associated RAM cranked up to their highest speed all the time, ready for whatever I throw its way.


Heat and power consumption aren't as important to me as raw speed whenever I want it.


That only happens in Windows when you use special high performance drivers for things like gaming.


I also don't care about Apple's font scaling; if they look good at Apple's default resolutions, other resolutions aren't as important.


Having different priorities does not mean bad engineering.

Jun 9, 2020 12:27 PM in response to dcristof

I absolutely cannot say that's what Apple intended, but that's what I would want.


In the US where the Toyota RAV4, Honda Civic and Toyota Camry are the most popular vehicles with some even choosing hybrids and electric vehicles, some people still prefer to buy high end sports cars that get 8 MPG even if all they do is commute on city streets.


It's like the complaints about the pricing of the new Mac Pro tower; if it's too expensive for you, you likely aren't its target market - it's aimed at people for whom $50K for a high end graphics workstation is a steal (and there are those customers) as well as those for whom the higher prices can easily be amortized in increased customer billings due to time saved.


I hold no animosity if you decide to purchase something else; once again I don't work for Apple, and you obviously have specific needs for which the MacBook Pro may no longer be an appropriate choice.


Thankfully, for many thousands of others, it's the best MacBook Pro ever made.


As always, if you feel differently, complaining here is not the right venue, this is:


Feedback - MacBook Pro - Apple


Those of us who have been around the Apple Support Community for years have been told time and time again that comments made there hold far more import than anything said here.

Jun 9, 2020 4:22 PM in response to dcristof

dcristof wrote:

If that is the case William, then we all disagree with you significantly, and this will be my last MacBook Pro.

One question for BootCamp users; has it gotten any better? I was considering investing some time in an install.

Never mind.. BootCamp is BootCrap.. Just buy a PC laptop.. Don't loose your precious time..


Bluetooth: If you are going to use headphones -who does not?- forget it. When you connect a second device headphones are jittery..


Battery: The dGPU is always but always active, CPU is not undervolted.. If you watch a video, system directs it to dGPU and system consumes 50W! FIFTY WATTs for a youtube video.. Also dGPU driver is buggy as ****. If you connect external monitor, the performance flactuates.. Edge works nice, Chrome eats CPU/GPU..


Wifi was the slowest one, with the update it is fixed though..


Toucpad is the worst PC touchpad I've ever seen.. Even 5 years old computer's touchpad is much better.. I fixed it by an open source driver, however it has its own problems..


Touchbar is buggy as well.. If you connect external monitor, and then remove, sometimes it does not come back.. Pressing Fn key does not solve, you have to force the device to go standby and wake up to resurrect the touchbar.. BTW: Who the **** think this useless piece of glass.. Whenever I return to a device with function keys, I feel that it was torture using TB..


I think I'll buy a thin and light PC to carry with me, and will sell this device.. I've been using this for GPU however I'll use PC for it, and use old MBP 13.. And carry two computers..


I wish I don't have to work on iOS.. If Apple was good at software, I was planning on buying iMac etc.. But unless you work on web or iOS those devices are useless..

Jun 9, 2020 5:57 PM in response to denizcan

Well, it's too bad you dislike Apple hardware so; what you feel about their laptops is the way I feel about every PC laptop I've ever come into contact with, bar none.


Different people use different products differently, and have different needs.


All I can say is that for how I use my systems, macOS and Apple products are the easiest to use, best hardware and allow me to be the most productive.


I'm not sure what WiFi issues you were seeing, but my MBP 16 has been maxing out its WiFi connection since day one with no issues.


The touchpad is my absolute favorite part of Apple hardware, to the point where I can't even stand to use a mouse if at all possible, instead I have Magic Trackpads for all of my non-laptop Macs. They're intuitive, and just magical in their response where every PC laptop trackpad has been a pain for me to use, they're either too sensitive or not sensitive enough and the first thing I always have to do is shut off tap to click (on Macs, too.)


Frankly I rarely use the touch bar… or function keys. All I need is a physical ESC key, and the MBP 16 brought that back, which is why I finally upgraded from the last non-touchbar generation of MBP.


50W for the GPU? Awesome, I want the GPU driven as hard as it can be at all times, but we've covered that - speed is important for me, power and heat are zero concern for me, the same way they aren't for PC gamers. (GPU power use of 185w, now that's impressive.)


If you want thin and light, the MacBook Air is a great model, but I'm sure there are good PC laptops out there… somewhere, my biggest problem with them is you'd have to use Windows if you don't install a Linux distro.


I am thankful I don't have to use Windows, as there is literally nothing positive about any interaction I've ever had with Windows. The interface is horrid, non-intuitive and just generally a pain to navigate through even for something as simple as "What size hard drive does this machine have" or "What are the current network settings?"


It's a pity you think Macs are useless because they allow millions of people to be more productive than they would be using Windows every day with the added benefit that you never, ever have to wait for your virus software to update (unless for some reason you feel compelled to install one, usually only because a corporate IT department somewhere said you had to.) Nor do I ever need to install drivers or sort out driver conflicts.


I wish you all the best in your future endeavors.

Jun 10, 2020 2:45 AM in response to Dogcow-Moof

That's simply false. A GPU is powerful and should consume more power only when it activates most of its transistors when it does 3D draw/processing calls. Most of people here having problem when the actual GPU utilization close to nothing when you connecting to external monitor. It doesn't matter what the resolution is.


So you are saying a GPU with close to 0% usage should produce that much power just because it's "powerful"? I have desktop Vega64 3 times as more powerful than this 5500M and I bet you it consumes less than 20W when it's IDEL.

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MacBook 16-inch Fan Noise

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