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

Apr 21, 2020 12:38 PM in response to DPJ

I don't want to get in a back-and-forth on this, but their support forum guidelines have multiple references to Apple's involvement and participation. Granted, it's not guaranteed, but if you think they don't pay attention to what's being discussed....


Also, if they don't then who moderates comments? My original reply was moderated for discussing what our next steps are. Also, it doesn't explain why our CEO, who started this thread, got banned for a week.

Apr 21, 2020 12:57 PM in response to BeatnikMoon

BeatnikMoon wrote:

The issue is we have taken it up with Apple directly, even having a call with a regional Business Team manager. We were told that our issues would be escalated and that they would take care of it. But that's as far as it's gone -- we've had no other updates from anyone. Therefore, these forums are another step in making sure Apple is aware of what's going on.


The thing is, you did have the meeting with Apple and this forum is not a good way of "making sure Apple is aware" of anything.


The other thing is sadly, you just need to be patient as that's how Apple has always worked - they collect data from you and you don't hear anything more until someday it is fixed or a repair program is rolled out.


Also, if they don't then who moderates comments? My original reply was moderated for discussing what our next steps are. Also, it doesn't explain why our CEO, who started this thread, got banned for a week.


Apple only reads these forums to enforce compliance with the Apple Support Communities Terms of Use, not for support reasons (though there are Community Leaders who will chime in with solutions to simple issues.) If Apple development engineers reach out to you due to comments posted here it's only because they read the forum on their own time, not as part of their job.


Your CEO had posts removed and was given a timeout for repeated violations of the Terms of Use that you, I, and everyone else posting here had to agree to follow when creating an account.

Apr 21, 2020 1:13 PM in response to Dogcow-Moof

I understand they don't offer support through here. My reply wasn't to ask for support, but it WAS to support the issues we're seeing. But would it really hurt for someone, in some capacity, to say "we hear you, and we're actively looking into this issue", even if it was on their own time? It wouldn't even have to be that specific! Just a "we know this thread is going on" would probably be enough for most posters.


I get you're passionate about Apple products. I am as well -- been an active user of virtually everything for a decade. What I don't understand is the "need to be patient" explanation and the lack of any communication. This thread was started 5 months ago, and has been viewed and responded to by a ton of people (way more than the stats show) seeing similar problems. I think we've all been MORE than patient.

Apr 21, 2020 1:32 PM in response to BeatnikMoon

"But would it really hurt for someone, in some capacity, to say "we hear you, and we're actively looking into this issue", even if it was on their own time?"


What you need to keep in mind is the Apple Support Forums are not dedicated to the MacBook Pro. There's also several discussions of MacBook Air, MacBook, iMac, iMac Pro, Mac Pro, Pro Display XDR, MacOS, iPhone, iPad, HomePod, Apple Watch, Apple TV, Apple Music, iTunes, etc. It's impossible for any one engineer to come to the Apple Discussion Forums and put forth time into this thread as there are other threads that people are screaming for help in as well. Often due to user error (which IS often) not everything will be seen as a problem by simply reading forums. I personally have addressed the battery drain issues with the 16" MBP by listing the cause of issues and it's helped the same people who thought their MacBook Pro was defective when it really wasn't.

So you can't expect Apple engineers to simply say "We hear ya, we're working on it". It's not that Cut n' Dry. That's a perfect world in tech we'd all love to live in. And just in case you think I'm backing Apple. I'm not. I've had my share of issues with my Apple products over the years. I just use logic and reason when it comes to expecting anything on forums.

Apr 21, 2020 1:49 PM in response to DPJ

So I'm not using logic and reason. Got it. Unless, of course, you meant "I just use logic and reason when it comes to expecting anything on APPLE forums." Even then...that's a rather petty response.


Having had forums in one form or another in the the last 3 businesses I worked for, one of which I helped start, I can tell you we had people review forum posts, answered people's questions and escalate issues mentioned in there -- and let people know we saw the issues, were working on fixes, and then had fixes ready for release -- even if we didn't use the forums/communities as official support channels. It didn't matter if we had millions of users or thousands, if it was during work hours or on our own time. It is just good customer service.


I applaud your ability to help people with user issues. It does make a difference, and we've all been there. What I got from your response, though, is that I should lower my expectations and have the patience of Job when dealing with Apple..a company we've spent hundreds of thousands of dollars with over the years. This is the first major issue I've had with an Apple product, and if that's your advice, and the expected course of action when dealing with a major issue, I'm not sure I can abide that.

Apr 21, 2020 1:52 PM in response to DPJ

DPJ,


I am very impressed by all of your accolades and accomplishments on this forum many of us will never reach such status.


I admire your dedication and can’t wait to hear more of your encouraging guidance and

advice regarding the heating and fan issues we are experiencing.


please keep us updated! You are an inspiration to all of us Apple fans!


thank you for your help!

Apr 21, 2020 1:53 PM in response to BeatnikMoon

BeatnikMoon wrote:

Having had forums in one form or another in the the last 3 businesses I worked for, one of which I helped start, I can tell you we had people review forum posts, answered people's questions and escalate issues mentioned in there -- and let people know we saw the issues, were working on fixes, and then had fixes ready for release -- even if we didn't use the forums/communities as official support channels. It didn't matter if we had millions of users or thousands, if it was during work hours or on our own time. It is just good customer service.


That's because you used your forums as at least unofficial support channels and as a way for your company to interact with your customers.


Apple provides these forums only for users to help each other. That's it, period.


Apple Support is done only through, well, Apple Support.

Apr 21, 2020 1:57 PM in response to Dogcow-Moof

I get it, and yes, I agree. We did, even if the main point of having them was for user-to-user communication.


My point is only that I would *think* they at least monitor what's going on. And if they *do* see a thread going on for an extended period of time, with thousands and thousands of replies across hundreds of pages, that someone, somewhere, would say "hey, I think we have an issue" and look into it.


Maybe they are...maybe they aren't. BUT that doesn't mean they can't reach out to their moderators and at least offer some guidance on how to respond to people. Maybe I'm expecting too much and if so, I'll have to reconcile that.

Apr 21, 2020 2:27 PM in response to BeatnikMoon

"So I'm not using logic and reason. Got it. Unless, of course, you meant "I just use logic and reason when it comes to expecting anything on APPLE forums." Even then...that's a rather petty response. "


I believe was speaking about myself only on how "I" view forums and what "I" expect and understand when it comes to needing tech advice/help on my Apple products. My post suggested nothing about you. You're taking things personally. Please do yourself a favor and reach out to Apple directly. That's what I do when I have issues. Your displeasure towards me is displaced.

Apr 21, 2020 10:12 PM in response to ntompson

I should add: the update to 10.15.4 broke CalDigit's firmware updater. Probably too late for most people, but if you - like me - discover that your CalDigit TS3+ was shipped with old firmware, you'll need to run the updater under 10.15.3 or earlier. CalDigit have confirmed that 10.15.4 broke their updater, and unfortunately they don't have an ETA for a fix.


10.15.4 hasn't been fun, by the way. I open my MPB lid most mornings (80%) to be greeted by a kernel panic. It appears to be associated with closing the lid while connected to the CalDigit TS3+ the night before.


It's hard to stay positive about Apple right now.

Apr 22, 2020 5:41 PM in response to TimUzzanti

We had another interesting thing occur today that's similar to that display issue I posted about, but this time it's just when using Chrome browser. I don't believe this is necessarily graphics card related as it happened while we were in a video chat, and she shared her screen with us to show us -- that's how I got the screenshot. EDIT: It's not the first time this employee has seen this, but this is the most recent time it occurred.


This is the ribbon on Office 365:


Has anyone seen anything like this, or have any idea why this would happen in a browser? It's fully updated to the most recent public version. Are there any other Topics anyone knows about with an issue like this? Thanks...

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MacBook 16-inch Fan Noise

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