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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

Reply
4,224 replies

Jun 15, 2020 9:54 AM in response to jc_9

It's happened before.


The clock speed is lower due to the desire to keep TGP down to 50w.


iTech23 wrote:

I know because that type of memory consume less power,
do some research before writing.


I'm not sure why you're targeting me, as I never questioned your assertion on this.


HBM2 memory does use less power, but AMD considered the power usage of memory + the GPU when tuning the clock speed to keep power usage down to the envelope they wanted, so it may well be that the power consumption levels of the 5600M will be the same as those of the 5500M, it's just the 5600M will have greater capabilities at those power levels.


Jun 15, 2020 9:55 AM in response to DPJ

It's an open ended question, I'm not looking for answers from you ☺️


I'm very happy you don't have problems with your unicorn MacBook and thank you for admitting that you do believe it is reasonable to expect fans not to be audible when in a zoom call just because you're connected to an external display therefore any macbook that does this is clearly defective.

Jun 15, 2020 10:00 AM in response to ahmedfromreservoir

ahmedfromreservoir wrote:

I'm very happy you don't have problems with your unicorn MacBook and thank you for admitting that you do believe it is reasonable to expect fans not to turn on when in a zoom call just because you're connected to an external display therefore any macbook that does this is clearly defective.


He said no such thing.


He said his fans didn't turn on, just like mine didn't.


It may be due to differences in monitors and the way they are connected, so if "no fan" operation is important to you, you may need to duplicate his configuration down to the monitor, cable used and temperature in the room.


Regardless, no claims of fan-free operation are made, so running fans, once again, are not a defect.


If you connect to the exact same monitor DPJ was using, using the exact same cable in a room at the same temperature and your fans ramp up where his did not, you may have an argument to make.


DPJ, what was the monitor and how were you connected? My "no fan" experience was using a TB3 to MDP converter and an MDP cable.

Jun 15, 2020 10:02 AM in response to ahmedfromreservoir

"be happy you're one of the very few lucky ones ☺️"


Nope, not lucky and not one of the few. Millions of these machines are sold everyday and according to many more people on Reddit (that I frequent daily) people are very satisfied, and these people are the ones posting pics of their 16" MacBook connected to external displays. If this isn't the machine for you then you may sell it (if you already bought it and are past the return period) and buy the proper computer to suit your needs.

You want to argue, I don't. I came here to reply to the poster making statements that Apple never stated on their website. Good day.

Jun 15, 2020 10:04 AM in response to RICHD101

Crazy how whole communities are having trouble because of the fan noise indicating the defects are quite far reaching, thank you for confirming again that a macbook pro that doesn't have audible fans just for being plugged into an external display is in fact the exception not the norm.


Just the fact we are supposed to find some magical and none specific combination of cable/monitor combination is a testament to the defective nature of the device...

Jun 15, 2020 10:11 AM in response to ahmedfromreservoir

ahmedfromreservoir wrote:

Crazy how whole communities are having trouble because of the fan noise indicating the defects are quite far reaching, thank you for confirming again that a macbook pro that doesn't have audible fans just for being plugged into an external display is in fact the exception not the norm.


Actually, we don't know what "the norm is;" certainly many here are having issues, but among MBP 16 customers, certainly many are not. Apple knows for sure as they have the actual data.


However, it makes sense that most posting to a forum thread dedicated to those with the issue would find many having the same experience here.

Jun 15, 2020 10:23 AM in response to Dogcow-Moof

Let me repeat. We have touched 25+ 16inch MBP's all with different configurations and all have the same issues. And, everyone in this thread who has received replacement units have had the same experience. Working units by review sites and individuals which thought there were no thermal issues saw these threads and re-tested with external monitors and had the same experience. These are the facts and are not arbitrary comments.

Jun 15, 2020 10:32 AM in response to TimUzzanti

Have you tried a Dell U2717D connected via a TB3 to MDP adapter via MDP? That's the configuration I verified, as that is the monitor I have handy.


You confirmed that the configurations you tested experienced the issue, that doesn't mean others configurations wouldn't, and indeed others here have verified that is true for them.


Especially within a single company that has likely standardized on a particular monitor and connection method, it's best to look for the commonalities here.


Unfortunately I don't have access to other MBP 16s to see if mine is a "unicorn" somehow.


Jun 15, 2020 10:33 AM in response to denizcan

Hi guys just wanted to share with you that yesterday I was doing some machine learning on the MBP16 using the CPU for the computations and unplugged for any external display. During the training of one of my models I noticed the temperatures of the CPU were close to 90 Celsius, yet the computer felt smooth and handled the task like a champ. Even more interesting is that the fans were spinning at 2700 RPMs max which made the fan's noise barely noticeable.


My point is the MBP made the fans spin at barely 2700 RPMs when the CPU was reaching 90 Celsius and kept the CPU at around 80 Celsius for the time my computations lasted.


Why in the world does the Macbook need to spin the fans of my computer close to 4000 RPMs while doing absolutely nothing except from powering an external display.


This really seems like a software issue, my question is why Apple hasn't addressed it?

Jun 15, 2020 11:00 AM in response to Dogcow-Moof

As discussed in this thread, we have used many monitors, cables and connections all with the same results. Our customers have had the same experience and it seems everyone in this thread is in the same situation. This includes 1080p and 4k monitors but not 2560x1440 which is what I believe the U2717D is. If 2560x1440 is the only resolution that works, Apple would need to solve that but Apple just stops responding to customers and disappears. This is why customers are so upset, Apple hasn't done anything to show us they realize it is an issue or if they are working on it. In many cases, they say it is working as expected which is extremely disappointing because there is clearly a problem.


As I also mentioned, we have new customers who have purchased new 16inch MBP's and are experiencing these same issues. I am currently waiting for a call from our Apple Business Team who has now connected with the Enterprise Team at Apple. Maybe we will have some luck after 7 months.

Jun 15, 2020 11:00 AM in response to TimUzzanti

I'm not saying 2560x1440 is the only resolution that works, I'm just saying that's what I had available to try and had zero issues.


Yes, most everyone in this thread had issues, but this thread exists for people who did have such issues or are interested in them.


Most people not having issues aren't bothering to post here.


Apple doesn't "stop responding to customers," they contact customers for specific pieces of information and once they have them, they do not respond further. That's how Apple has always worked, we've been through this time and time again.


The machines may be heating more or using more power due to a bug,, or they may be working as designed but the machines involved are all working.


The new GPU adds significantly more graphics power but if the fans spin up the same way when using the 5600M you will know that the current behavior is in fact what is expected.

MacBook 16-inch Fan Noise

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