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

Dec 17, 2020 3:31 PM in response to urs112

urs112 wrote:

Yes. Bought it in 2019, with 64 GB of memory and 4TB HD. As I am not doing any graphics intensive work, I decided against the 5500 and hey, the Apple 30" Cinema HDs worked fine for me all the while


How are you connected to your 30" Cinema Display?


When I connected to my 30" Cinema Display using a TB to MDP adapter, my fans didn't even spin up.

Dec 17, 2020 4:40 PM in response to Dogcow-Moof

I bet so many people on this thread would love to have an option to order that special edition computer that you got William. While everyone else's 16" macs spin up fans when opening browser, your never does even when performing demanding tasks. Definitely doesn't sound sketchy. Well but it doesn't seem that apple will be fixing this defect. The best case scenario is their statement 2 years later that "a small percentage of people were suffering an issue" lol.

Dec 18, 2020 2:55 AM in response to romain89

romain89 wrote:

So who wants to try that TB to MDP adapter (difficult to find by the way)


There are literally dozens available on Amazon.


This is the one I use, a whole $18.99; I'm sure many others would work just as well as would various USB-C docks.


Yes, the system reports the dGPU is using 19w, but despite that my fans never went above 2500 RPM even after playing full screen HD video on the external monitor for an hour while surfing this forum on the built-in screen.


I saw the same behavior on a Dell U2717D and an Apple 30" Cinema Display (when connected to the Cinema Display using a MDP to Dual-Link DVI adapter.)

Dec 18, 2020 3:08 AM in response to Dogcow-Moof

Good Day, William.


Do you believe that drawing 19w of power just to draw a bunch of pixels is okay for a laptop?

Don't you think that is just HAS to be okay to be able use the external monitor without drawing so much power to be transferred into heat? Yeah, some people would say that the laptop is designed in such a way, ant it acts as it suppose to act. However, if it is true, then why can't one blame the company for a poor design and lack of prudence?


The user above (itunestux) seems to have a real solution, in which external monitor doesn't invoke the activation of a dGPU.

Dec 18, 2020 3:16 AM in response to Azech

Yes - it's using the amount of power it needs to for the dGPU to drive VRAM at a rate AMD feels is necessary to avoid flicker.


Note the dGPU may draw up to 50w.


GDDR6 VRAM is known to draw a fair amount of power, but it's less expensive to implement; this is one of the reasons AMD went with HBM2 VRAM on the 5600M GPU, which allows that GPU to use less power but it's more expensive.


There's always a cost/power trade-off with high-end GPUs, and the 5300M and 5500M were the fastest AMD Radeon Pro GPUs available when the MBP 16 first shipped.

Dec 18, 2020 5:43 AM in response to Dogcow-Moof

Well all the info you've shown, shows that your special edition macbook consumes 20watts just like every other 16" mac on this planet. But for some reason your's remains silent. Must be a custom made one. Or the one with a broken fan.


Apple service ran tests on mine last week and stated that it passes all Apple tests - aka apple won't fix it. However, just the other day I have recorded a video as an evidence for a lemon-law claim where I opened meet.google.com on a freshly booted mac and toggling between 144hz and 60hz back and forth on my 1440p monitor alternates fans between 1800 (on 144hz) and 3000+rpm (on 60hz) (it takes ~3 minutes for rpm to ramp up or slow down after the change in refresh rate is made). Mac kept in clamshell mode throughout the test. One more participant in the meeting. So basically it was me streaming audio, one other participant (my phone lol) streaming audio and video and nothing else running on the computer. CPU load ~5% throughout the video (10% peak). Btw, this was using HDMI. For this monitor (it's a freesync) switching to DP results in 20w power usage in all modes (and elevated fan speed as a result of that). For other monitor I have it's the opposite - DP has some low power modes and HDMI results in high power consumption.


So if you keep claiming that your computer uses dGPU to drive your external monitor and it performs differently, there are only 4 options I can come up with:

1) it's broken and wouldn't pass apple tests

2) you have a special edition macbook that performs differently from every other macbook 16"

3) you have a hearing damage that you aren't aware of

4) you are simply lying about your computer being silent


P.s. I can upload the video proof. Can you?

Dec 18, 2020 12:18 PM in response to Dogcow-Moof

So basically you have just proven that your macbook ramps up the fans just like any other macbook. 2500 is audible - not loud but clearly audible. Just from running a full hd video in 2020 lol. 5 year old iphone can play full hd without even getting warm. So does a 5 year old macbook pro running a dGPU. By now you probably know that playing same video on 144hz would have fans on idle speed, right? that's 1800rpm. And that's with 2.5x more work for the "not-defective" computer.


Opening Xcode (not using it, not compiling, but just opening it to the "welcome screen") gets fans to 5500rpm if dgpu is in high power mode. Playing video on youtube - ~2500-3000rpm. Opening appcode / intellij. Lol. Java. This will keep it on 5500 for 30 minutes. None of that happens if running 144hz-160hz (intellij will get it to 5500 for a moment like it does to any other macbook on the market). All in clamshell of course.


So with that out of the way...


This makes me rather curious what you use your macbook for (i don't expect you to answer) since you "never heard fans ramp up" except when "performing a macos upgrade". Opening anything that loads cpu even by 15% will get it screaming @5500rpm if gpu runs in 20w mode. So this leaves us with some options again:

1) You either use your powerful macbook to perform tasks that are as challenging for your macbook as editting txt files in textpad.

and then 2), 3) and 4) from the previous list.


Given you are saying that it's not bothersome for you, maybe that's #3 after all? That would indeed explain all your comments in this thread. Cause right now it's you and 2-3 others who are fine with it and 250 pages of people (given 50% of comments are written by you, so it's 125 pages of other members) saying that computer is too loud when it shouldn't be based on previous experience (other macbooks with dgpu) and based on evidence provided in this thread (dgpu running in 5w mode with 2.5x higher load).

Dec 18, 2020 1:19 PM in response to PinStudios

PinStudios wrote:

So basically you have just proven that your macbook ramps up the fans just like any other macbook. 2500 is audible - not loud but clearly audible.


Not at all, not even with your head on it. Perhaps I have a magical sound deadening Mac.


If 2500 RPM is going to bother you, best get a new M1 MacBook Air or stick to an iOS device.


This makes me rather curious what you use your macbook for (i don't expect you to answer) since you "never heard fans ramp up" except when "performing a macos upgrade". Opening anything that loads cpu even by 15% will get it screaming @5500rpm if gpu runs in 20w mode.


That simply isn't the case. It's not like I launch apps then wait for the machine to cool before using it.


I do audio editing, Final Cut from time to time, and programming plus web surfing and the usual Zoom usage.


No noticeable fan noise, but in my configuration with the monitors I have on hand.


Cause right now it's you and 2-3 others who are fine with it and 250 pages of people (given 50% of comments are written by you, so it's 125 pages of other members) saying that computer is too loud when it shouldn't be based on previous experience (other macbooks with dgpu) and based on evidence provided in this thread (dgpu running in 5w mode with 2.5x higher load).


Honestly, I think the real problem is believing that an incredibly powerful Intel processor and one of the fastest dGPUs available means fans won't ramp up to high speed from time to time. I've stated that I can walk into Best Buy and do nothing more strenuous than pull up the Settings menu in Windows 10 on a number of laptops and hear their fans instantly jump up to speeds that would drive people on this thread insane. It's just a natural consequence of putting such powerful hardware into a constricted space. Apple never promised a silent experience and their thermal design is brilliant as it handles the load much better than comparable Windows laptops do.


Some here have played with display timings and have done other tricks to try and get the load down at the result of video performance that AMD deems unacceptable for their products. That's fine if it's important to you; Apple and AMD apparently don't deem it worthy of generating subpar graphics.


These devices generate heat, and that heat needs to go somewhere.


Most of the time the MBP 16 can handle it without the need to throttle. What's even more amazing is many people are doing the kind of tasks that really should be better done on either an iMac or Mac Pro and they expect a laptop to handle it quickly and silently. "My old MBP could do it" - yet its dGPU wasn't as powerful and you felt the need to upgrade.


If nothing else, neither Apple nor AMD were apparently happy with the situation because AMD did design and release the Radeon Pro 5600M GPU which uses less power at the cost of being much more expensive (as the more power efficient HBM2 VRAM is more expensive than the cheaper but more power hungry GDDR6 VRAM used on the 5300M and 5500M.) Apple is obviously further frustrated by the power demands of the Intel CPU or they never would've decided to move to Apple Silicon for new MacBook Pros.


Ultimately, if it bothers you, sell it and find something that does meet your needs. Get an MBP 16 with the 5600M, or a Windows laptop that's silent, if you can find one - certainly neither Dell nor HP make one comparable in my experience. Life's too short, and almost all businesses can find a way to leverage the increased productivity into greater client billings.


Using the number of people who post here as an indication of the feelings of the greater Mac community is also specious simply because the only people who seek out and post to this thread are people who are unhappy; owners who are thrilled with their laptops don't bother to come here and post that they are. I personally interact with a few hundred people who use MBP 16s every day in my job and they have no complaints. Likewise, a huge number of Apple employees have an MBP 16 as their personal machine that they use all day connected to external monitors either in the office at Apple (before COVID) or at home, and they have greater access to hold their coworkers' feet to the fire than we do. None of that, of course, changes the fact that you are unhappy or that other posters here or unhappy.


Thus my earlier admonition.


You can only deal with the equipment and options you have available.


You can either:


  1. Live with what you have and find a way to minimize the fan noise/heat generation.
  2. Sell your 5300M/5500M MBP 16 in favor of one with a 5600M.
  3. Sell your MBP and go with a Windows PC and Live with the negative consequences of that decision.
  4. Continue to complain here and be disappointed when the situation has not meaningfully changed this time next year.


This isn't to be dismissive or to belittle your concerns, it's simply being pragmatic and realizing that one has to make a decision based upon the products available.


Dec 18, 2020 4:56 PM in response to Dogcow-Moof

You do audio editing yet you don't hear your computer @2500rpm even with your head on it? Not trying to troll here - but did you ever had your hearing checked? 2500 produces sound that is easily picked up by the iphone located 3 feet away from the computer. And iphone isn't really good at picking up quiet noises. I have quite damaged hearing (diagnosed) and I can hear 2500rpm (it's not annoying though).


You avoided my main point again where without any tinkering this computer can perform with a much higher load, much better than it does with a low load :) I mean 144hz vs 60hz and 20w vs 5w. What it can't perform is remain silent on 60hz mode. And yeah, i've heard your story about screen tearing when 2 monitors of different resolutions are in play - that's not the case. The broken thing can't drive single 1920x1080@60hz without sounding like a vacuum cleaner. Yet it can drive 3440x1440@160hz as if it doesn't care. Definitely "not defective".


You can either:
1. Live with what you have and find a way to minimize the fan noise/heat generation.
2. Sell your 5300M/5500M MBP 16 in favor of one with a 5600M.
3. Sell your MBP and go with a Windows PC and Live with the negative consequences of that decision.
4. Continue to complain here and be disappointed when the situation has not meaningfully changed this time next year.

Number 5 would be - get a faulty hardware returned under the lemon law. And for people who can't do that because they live in a place that doesn't protect the consumer - wait for apple to lose another action lawsuit and say "few percent of users were experiencing issues, therefore we replace their motherboards". That wouldn't be anything new. What is new however is people defending defective hardware as if their life relies on it.

Dec 19, 2020 11:35 AM in response to TimUzzanti

I bought a MacBook Pro (16", 2019) in March 2020. I'd hoped to add a Pro Display XDR and was just researching the purchase. Fan noise would prevent me from buying any external display though I'd really like to buy the XDR.


Was the fan noise issue with an external display ever resolved (some of my system's details are provided below) with a software or firmware update or a fix of some sort (without resorting to an external GPU)? I do some heavy lifting in Xcode where I would like quiet. I would be willing to tolerate some fan noise during video editing and the like. I also do some writing with various text editing tools such as Scrivener where I want dead quiet.


If the issue hasn't been resolved, I have to say I'd be sorely disappointed in Apple and astonished by this failure and their willingness to ship a flawed product for an obvious and common use case (there's no virtue or excuse in finger pointing at suppliers such as Intel). I waited many, many years to upgrade from my trusty old 15" MacBook Pro.


Model Name: MacBook Pro

Model Identifier: MacBookPro16,1

Processor Name: 8-Core Intel Core i9

Processor Speed: 2.3 GHz

Number of Processors: 1

Total Number of Cores: 8

L2 Cache (per Core): 256 KB

L3 Cache: 16 MB

Hyper-Threading Technology: Enabled

Memory: 64 GB

System Firmware Version: 1554.60.15.0.0 (iBridge: 18.16.13030.0.0,0)


Video card AMD Radeon Pro 5500M w/ 8GB VRAM

Dec 19, 2020 11:51 AM in response to loopdoc

loopdoc, XDR is a tremendous display. However, in combination with your MacBook Pro you will most likely have to expect the result of really annoying fan noise as a result of the defective design / driver of the dGPU. You have the 5500 which will not be able to provide adequate power consumption. Means there is always full power. Regardless whether used or not. Unfortunately with the fans spinning even if you will do simple things like surfing or using your MacBook with XDR just as a citrix client. I recommend you install iStat Menus and walk to the next Apple store an ask to plug in for test. Then you go to iStat. If the value "Raden high side" walks above 5W (without further application running) and goes to 18..20W then you may plug off - you will not become happy with that combination. If it remains with 4..5W then you may want to give it a try.

I have two monitors with 1920 x 1200 from EIZO and use a USB to two HDMI adapter. Direct attached the noise is not acceptable as I do a lot of conference calls with teams and skype where I just cannot allow the fan noise.

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MacBook 16-inch Fan Noise

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