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iMac Pro - Fan noise? Reverb/Delay Processors (HW)
Old 19th December 2017
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iMac Pro - Fan noise?

I have heard the fans can be quite noisy under cpu heavy tasks on the regular iMac, do you think this is going to be a problem on the iMac Pro as well?
Old 19th December 2017
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Bump
Old 19th December 2017
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i had imac for couple years before 2010 model and it was ok to be honest even under heavy load. i guess with the new ones this should work even better.
Old 20th December 2017
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I have a 2013 i7 iMac w/SSD that is completely silent 99% of the time. Now and then a fan kicks on while doing a big render or process but never while working on audio in a DAW session, even big ones.

It's completely acceptable my mastering room.

I tried a 2015 iMac 5k and the fan noise was too much even with minor audio sessions so I returned it and still have the 2013.

I have a 10-core iMac Pro on order and I hope that the fan noise is like my 2013. If it's not, I may end up trying a 2017 iMac 27".
Old 20th December 2017
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Justin P. , please keep us updated!
Thanks!
Old 20th December 2017
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sam c's Avatar
 

My 2013 iMac is silent 99% of the time as well.
Old 21st December 2017
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"[t]he new iMac Pro is powerful but offers near silent operation, with a gorgeous display and enclosure. The new iMac Pro is significantly faster than the 2013 Mac Pro and the existing iMac lineup."

First review I came across.
Old 21st December 2017
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Quieter than iMac?
Old 21st December 2017
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"Near silent" is a very relative term. Silent for a graphic designer in an office with some background noise from other things/people etc would be different than silent for an audio engineer.

A friend of mine did a new studio build out and the contractor insured that the A/C unit was quiet. It might be considered quiet by say an auto mechanic shop, but it wasn't nearly silent enough for a recording studio.

Hopefully next week some units start arriving and we get some real world reports.

Mine is due to deliver Jan 4th-9th at this point.
Old 21st December 2017
  #10
Yeah, I was at a german public broadcaster studio with a workstation. Everyone was happy, until the department manager came. He complained about the computer noise when he had his ear over the system. Everybody was a bit baffled because we all thought it was dead silent. Until we found out he actually was complaining about the noise from the Lexicon 480 mainframe in the machine room, somebody left the door slightly leaning open.
I also know people who think a 480 mainframe is silent...
Old 29th December 2017
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I guess the first shipments are starting to take place. Any first hand experience with the noise level working with audio on the iMac Pro yet?

Last edited by erike123; 30th December 2017 at 03:31 PM..
Old 30th December 2017
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Old 30th December 2017
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I've since done some lighter duty mastering sessions with the 10-core iMac Pro and still haven't heard the fan run. It's a bit warm if I put my hand back there but it seems to stay cool enough to not need the fan, or at least at any audible level in my quiet room.

I don't do any large mixing sessions or virtual instruments work so I can't speak to that.

I have done some long/heavy renders with WaveLab, Saracon, and RX6 and it hasn't triggered the fan to kick on loud.

So far still good.
Old 31st December 2017
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Quote:
Originally Posted by Justin P. View Post
I've since done some lighter duty mastering sessions with the 10-core iMac Pro and still haven't heard the fan run. It's a bit warm if I put my hand back there but it seems to stay cool enough to not need the fan, or at least at any audible level in my quiet room.

I don't do any large mixing sessions or virtual instruments work so I can't speak to that.

I have done some long/heavy renders with WaveLab, Saracon, and RX6 and it hasn't triggered the fan to kick on loud.

So far still good.
Nice. I'm also considering the 10-core version, so this is very helpful. Is rendering in Wavelab, Saracon, RX6 considered stressing to the machine like a medium to big DAW project is? If not, do you have any way you can stress the CPUs?
Old 31st December 2017
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Quote:
Originally Posted by erike123 View Post
Nice. I'm also considering the 10-core version, so this is very helpful. Is rendering in Wavelab, Saracon, RX6 considered stressing to the machine like a medium to big DAW project is? If not, do you have any way you can stress the CPUs?
I'm starting to do more normal work with WaveLab, Saracon, and RX, rendering larger files and more quantities of files and still no fan noise.

If I have time this weekend I can try to do some stress testing.
Old 2nd January 2018
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Anyone else having experience?
Old 2nd January 2018
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Old 2nd January 2018
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Quote:
Originally Posted by scottkrk View Post
This video goes into detail about iMac Pro under full load, the short answer appears to be the iMac Pros stay quiet under load.



Video: Putting the iMac Pro thermals to the test
Because it throttles every 10 seconds, according to that article. It also mentioned fan speed isn't user definable even with the normal 3rd party apps.

So, the cooling causes the lowly 8 core to throttle in every one of their subsequent tests, I can only imagine what larger chips would do. I wonder what other power schemes contribute to keeping heat down and if they're user adjustable.

Speaking of fans, I saw the design of the fans in the iMP, like turbo fins. Problem with those is that they catch dust in the tiny nooks and clog easily. Also, the slightest bit of dust on the leading edges changes the aerodynamics and makes them howl. That opening it up to clean out once in a while is so involved is beyond logic.

First reports are junk, everything's clean and new. I'll wait to see what 6 months of use brings.
Old 2nd January 2018
  #19
Quote:
Originally Posted by scottkrk View Post
This video goes into detail about iMac Pro under full load, the short answer appears to be the iMac Pros stay quiet under load.


Video: Putting the iMac Pro thermals to the test
Short answer: it is throttling even before reaching 94° both CPU and GPU.
While it doesn't seem to throttle below base clock while doing 4K video editing, it does not use its all core turbo either, which shows that the design is cutting performance, as expected. Not bad for a thin box, but anyone interested needs to consider paying a lot of money for a design with built in performance cuts.
When doing a lot of heavy work, the tendency to continually reach temps above 80° in such a thin case may have a negative trend on component life cycle.
Old 6th January 2018
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So what I'm reading of this is I should stay away from the iMac Pro if fan noise is a critical point? Any other experiences so far?
Old 6th January 2018
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Quote:
Originally Posted by erike123 View Post
So what I'm reading of this is I should stay away from the iMac Pro if fan noise is a critical point? Any other experiences so far?
You might want to stay away until Meltdown is fully mitigated, and it sounds Spectre will require new chips in addition to mitigation. Perhaps by then fan noise too will be fully ameliorated -- who knows?

I'd wait for more news, if not new chips depending on how it pans out, before buying any new machine. Unfortunately, I just purchased a new iPhone, and Spectre appears to be a potential issue here. I'm not so much worried, but rather I'd like up-to-date chips if A11s (ARM,) etc will be reissued. Time will tell, but I already have the new phone. I wouldn't want to be in the same position regarding a $5000+ computer. I was eyeing Kaby Lake i7 iMacs, but even that purchase is on hold.
Old 13th January 2018
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Anyone have experience with the 10-core version as far as fan noise?
Old 14th January 2018
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Originally Posted by erike123 View Post
Anyone have experience with the 10-core version as far as fan noise?
Would love to know as well.
Old 23rd January 2018
  #24
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Anyone have experience with the 10-core version as far as fan noise?
Old 24th January 2018
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Bump
Old 24th January 2018
  #26
I’ve got the base configuration. I can confirm that even with all cores fully loaded I’ve never heard the fan. I have an easy recipe to fully load the cores. There is a bug in Reason 10 when used with UAD that makes a smallish project consume 100% cpu. I enabled hyper threading and all “16” cores show 100% utilization. I put my ear up to the iMac and there was no fan noise even after a couple of minutes. I was previously using a 2014 MacBook Pro and the fan noise drove me nuts. Aside from the reason bug, I’ve been really happy with performance thus far.
Old 30th January 2018
  #27
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iMac 5K

I should say that iMac 5K 27" 2017 is quite noise without any reason. Probably it is because of video card which is forced to calculate amount of information for 5K display. Very often even navigating through the Pro Tools session makes fun speed up. I did't notice such behaviour on iMac 2013.
The configuration is:
4,2 GHz Intel Core i7
32 GB 2400 MHz DDR4
Radeon Pro 580 8 GB
The less powerful iMac 5K late 2017 (3,4 GHzIntel Core i5, 8 GB 2400 MHz DDR4,Radeon Pro 570 4 GB) is much quieter.
Old 30th January 2018
  #28
Quote:
Originally Posted by Andrey Dergachev View Post
I should say that iMac 5K 27" 2017 is quite noise without any reason. Probably it is because of video card which is forced to calculate amount of information for 5K display. Very often even navigating through the Pro Tools session makes fun speed up. I did't notice such behaviour on iMac 2013.
The configuration is:
4,2 GHz Intel Core i7
32 GB 2400 MHz DDR4
Radeon Pro 580 8 GB
The less powerful iMac 5K late 2017 (3,4 GHzIntel Core i5, 8 GB 2400 MHz DDR4,Radeon Pro 570 4 GB) is much quieter.
Can confirm the iMac pro 5k is not noisy.
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