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

May 4, 2020 1:11 PM in response to Dogcow-Moof

William Kucharski wrote:

You can load up a compact pickup truck with a four cylinder engine and haul with it, and it will work, but you'd be a lot happier doing it with a full size pickup with a large V8 or diesel engine.

This vehicle analogy doesn't really work here - rendering to an external display doesn't need a high powered device, it can be done just fine with a mac mini or a cell phone.

May 4, 2020 1:29 PM in response to TimUzzanti

TimUzzanti wrote:

Although Apple was good about our Warranty and was used as a sales tool, it has caused a mess internally and we spent unnecessary money in the process. As I have said numerous times, we have spent a TON of money with Apple over the years and mostly good experiences but this has been a cluster and makes it really hard to depend on Apple moving forward from a computer standpoint.


That's fine, and I get that, but beware that going through a third party integrator is the only way you will get that kind of support on the PC side; you won't see it directly from a PC manufacturer.


I'm sure you're also well aware that even today Windows requires a lot more IT support than Macs do.


Still, you need to do what's best for your business and ultimately, you made a decision and I hope it all works out for you.

May 4, 2020 1:28 PM in response to TailsDog

TailsDog wrote:

Following your vehicle analogy - If a new 2020 RS3 is said to be more efficient than my current 2018 RS3, and I upgraded, and found it used more Petroleum, I would not be happy about it.


Certainly, that happens a lot in the auto world and it depends upon your use case.


Many newer "more efficient" cars do indeed operate more efficiently in a particular mode or modes but end up using more gas overall in others.

May 4, 2020 1:31 PM in response to TailsDog

TailsDog wrote:

A supercar is inefficient - A MBP 16'' is advertised as being more efficient that the previous generation, not just more powerful! Likewise with the GPU.

You have stated numerous times that Apple said this 16" is more efficient. I haven't asked before but can you post a link showing this? I have seen apple claim to have better cooling - and I agree that it is - but never seen where they advertised it for energy efficiency.

May 4, 2020 1:34 PM in response to TailsDog

I think that's rather disingenuous.


The Business Team was as helpful as they could be, and they stated the issue would likely be fixed soon, which is usually the case.


There appears to be more here, possibly even the fact that the system is working to at least some degree as designed, so there was little else they could do.


By extending the return period they also went out of their way to ensure a happy customer, or at least as happy as they could be in this circumstance.

May 4, 2020 1:51 PM in response to TimUzzanti

No, but you shouldn't be surprised when it heats up and the fans turn on to cool it.


There is nothing the MBP 16 is advertised it can do that it can't.


You're complaining of excess fan noise and heat, which is not specified anywhere in any Apple ad or in the technical specs for the machine.


I am assuming your employees don't have external monitors just to attend Zoom meetings with, so if they are going to regularly need a large, high resolution external monitor to do what they do then yes, I would recommend an iMac or Mac Pro for what they do, depending upon what it is.


Who should buy an MBP 16? Anyone that needs the most powerful MacBook Pro Apple has ever sold.

May 4, 2020 1:54 PM in response to TailsDog

TailsDog wrote:

There are links in this thread from a while back, it was discussed before.

Here is one: https://www.amd.com/en/graphics/radeon-apple-5000m-series

thank you for providing that link. I noticed it doesn't say anything about being power efficient.


I assume, and I believe that you do too, is the processor is probably much more efficient in watts per cycle but claiming that equates to energy efficient, like the A13 chip, but probably is disingenuous.


I would love to see a Mac that runs on Apple's own engineered chips as they really seem to be fantastic in heat to performance ratios.

May 4, 2020 2:09 PM in response to Dogcow-Moof

So, people should still buy a 16inch MBP if they can't hear people on video conferences and can't hear you because of fan noise or the machine is at 100 degrees Celsius for long periods of time and / or throttling etc? Ignoring the fact that the recent MacOS updates have made the 16inch MBP even more unstable in different ways as well.


All of which a MacBook Air can do without issue when using external monitors.


Telling people to move their laptops into different rooms, disconnect monitors every time they want to do different kind of task. or put it in a freezer to operate normally is just absurd.


We don't have users asking to process Bitcoin and complaining about fan speed or being throttled. People are complaining about simple tasks that push the 16inch MBP into weird behaviors that Chromebooks could do better and shouldn't.


All this talk about vehicle analogies are just attempts to deflect from the defects! I want to coin that phrase :)

May 4, 2020 2:25 PM in response to TimUzzanti

No one is telling you you can't do those things, but, once again, your experience is going to be non-optimal.


You don't have to put your computer elsewhere, but if the sound of a fan in a laptop is going to offend you, it's a viable solution.


If a MacBook Air can do what you claim, why did you buy your staff MBP 16s? I assume because they had other work to do, and that the MBP 16 would make them more productive at doing.


If you want to use a Chromebook, that's also your decision.


The fact remains the MBP 16 didn't operate the way you expected it to, but It never in any way failed to operate in the way it was advertised to.


For it to be defective, it would have to not meet the given specs, and I see no proof of that.

May 4, 2020 2:43 PM in response to Dogcow-Moof

Well, we come full circle and the laptop isn't defective. I have seen that is your common answer in other topics as well. I really wish I could stop my subscription to these posts now that we are in the process of returning them. It is a shame that moderators haven't learned how to respond to customers and support them instead of telling them they are wrong in every way!

May 4, 2020 3:36 PM in response to TimUzzanti

TimUzzanti wrote:

It is a shame that moderators haven't learned how to respond to customers and support them instead of telling them they are wrong in every way!


Given a moderator has never posted to this topic, you simply have no basis for that statement.


If the comment was directed at me, I am not a moderator, never have been and I have explicitly stated that more than once.

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MacBook 16-inch Fan Noise

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