Mid-2010 Mac Pro HUMMING NOISE

Discussion in 'Mac Pro' started by namethisfile, Jan 10, 2017.

  1. namethisfile, Jan 10, 2017
    Last edited: Jan 10, 2017

    namethisfile macrumors 6502a

    namethisfile

    Joined:
    Jan 17, 2008
    #1
    Hey,

    So, are Hums from these Mac Pro's normal? I'm asking because I haven't been able to find a definitive consensus from the net.

    My Mac Pro, which I got used from an eBay reseller has a hum. I've since put books on top of the Mac Pro and that has somewhat mitigated the hum to a low and more tolerable level. It's not fan noise or HDD noise. I've since cleaned and dusted the Mac Pro. And, the hum is still there.

    Is this a defect, a dying component or is the HUM just a normal occurrence with Mac Pro's since they're all aluminum with little vibration reinforcements that they hum like this?

    Thanks!

    PS--the HUM sounds like a Yoga Instructor meditating and humming. It's a constant HUMMMMMMM... if you know what I mean....

    PSS--My Mac Pro is 5,1, mid-2010, 6-core CPU, etc. The tower one.
     
  2. bjar macrumors member

    Joined:
    Feb 20, 2013
    Location:
    Sugar land, tx
    #2
    Check optical drive. That was my issue. Even without a cd it would hum the entire time. I could open the door on the case and push a little on the drive tray and it would stop.
     
  3. namethisfile thread starter macrumors 6502a

    namethisfile

    Joined:
    Jan 17, 2008
    #3
    Huh! It could be my mind playing trix on me. But, the Mac Pro hum is a little quieter.

    I, actually, replaced the Apple optical drive that was in there, with an optical drive I had laying around that was in my former PC case. I did that because the Apple optical drive had something inside that was making a rattling noise, anyway. And, my other optical drive did not have any rattling noise.

    The hum is still there but, subtly, less. I'm not sure if it was the optical drive switch. Or, that it is my ears playing hearing games.

    The only thing odd is that the DVD drive icon says TSSCORP something instead of what it used to say with the Apple optical drive in there.

    Also, one more thing, this TSSCORP optical drive is also quieter than the Apple one. But, I didn't really minded that before. The issue was that the whole thing have this hum.

    Anyway, I don't know.
     
  4. steveOooo macrumors 6502a

    Joined:
    Jun 30, 2008
    Location:
    UK
    #4
    Mine has been humming since I got it in 2011.
     
  5. carpsafari Suspended

    carpsafari

    Joined:
    Sep 13, 2015
    Location:
    the Netherlands
    #5
    I'm pretty sure its the GPU you hear!
    Can be annoying.
     
  6. steveOooo macrumors 6502a

    Joined:
    Jun 30, 2008
    Location:
    UK
    #6
    Ati 5770 - ok
    Amd 7950 - more noise (more power)
    Amd r9380 - less noisey - about the same as the 5770, maybe a bit quieter

    cpu upgrade from 2.8 quad core to 6core 5690 3.4ghz resulted in a bit more noise
     
  7. namethisfile thread starter macrumors 6502a

    namethisfile

    Joined:
    Jan 17, 2008
    #7
    It's not. I have the Gigabyte RX460 in there and the fans don't even spin, until, it's stressed.

    My guess is that the machined all aluminum construction with hardly any vibration insulation materials is causing the hum.

    I have the Mac Pro under my desk where I hear the hum more easily. It's less now that I switched optical drives and that I have books on top of it. But, it's still there. When I duck my head near the Mac Pro, I don't hear the hum. But, the fans.

    It's hard to describe. I'm leaning to case vibration causing the hum because of its omni-present nature. It's hard to pinpoint it, even when I have paper folded into a cone-shape as a hearing aid to find the source of the hum.

    Also, the fact that putting weight on top of my Mac Pro lessens the hum, is another evidence pointing to some vibration issue.

    Anyone else wanna chime in? Pun intended....
     
  8. pastrychef macrumors 601

    pastrychef

    Joined:
    Sep 15, 2006
    Location:
    New York City, NY
    #8
    If the case or lack of "vibration reinforcements" were the problem, it would have been all over the internet years ago.
     
  9. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #9
    It's important to identify the source, otherwise, hard to decide the solution.

    There are few possible sources. Basically you have to open the side panel when it happening, and give a little push to:

    1) each HDD tray
    2) PSU
    3) optical drive cage
    4) PCIe fan
    5) PCIe card (e.g. GPU)
    6) Processor cage

    If the noise change clearly when you push that item, then you know that should be the source, and then we can decide how to fix it.

    e.g. there was a member here identify that the noice was actually from the processor cage. So, he just put a piece of paper between the cage and the case, since then, the noise stopped.
     
  10. mattspace macrumors 6502

    mattspace

    Joined:
    Jun 5, 2013
    Location:
    Australia
    #10
    my 2009 dual used to get a vibration noise that went away with even the most gentle touch to the pci slot covers on the back. seems to have gone away since the machine was hung from its top handles.
     
  11. namethisfile, Jan 11, 2017
    Last edited: Jan 11, 2017

    namethisfile thread starter macrumors 6502a

    namethisfile

    Joined:
    Jan 17, 2008
    #11
    Well, I did the "touching" of parts in my Mac Pro as some of you have suggested and I can't get the sound to change.

    It could be the rear fan creating the vibration and humming. Maybe, when I have some time, I will look into it further and disassemble it or something.

    EDIT: It's not the rear fan.

    At this point, I think, I'll just put weight, aka books, on top of my Mac Pro as a permanent solution. It does mitigate the hum.
     
  12. hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #12
    It could be a out-of-balance fan or a bad fan bearing which causes the chassis to vibrate. You say it stops if you put books on it (dampen it) which would indicate vibration.

    It could also be a failing hard disk bearing, which would eventually emit a loud screeching noise, and you could test that by removing the drives to see if the noise goes away, then replace them one at a time until it comes back.


    I have a SSD only iMac with an external 4-disk enclosure which makes the antique desk it is sitting on hum occasionally. It will usually go away if I open/close the pen drawer, or slightly move the disk enclosure. Again ... vibration making the desk hum. o_O

    My 2012 cMacPro makes no discernible noise, humming or otherwise ... although I do hear the video card fan rev up occasionally.
     
  13. namethisfile thread starter macrumors 6502a

    namethisfile

    Joined:
    Jan 17, 2008
    #13
    Yeah. I'm leaning to an out-of-balance fan, too. I just don't know which one. I will have to investigate it further and look at some "How to..." videos on Youtube, or something. Lol!

    I can rule out failing or noisy HDD. I got this cMP used from eBay and the 1TB Hitachi Deskstar HDD that they gave me was noisy as hell. It has a "MAR 2008" sticker on it, so it's not the stock HDD and is even older than the cMP they sold me (a Mid-2010). No big deal. I had two newer Barracuda drives in hand, anyway, which are a lot quieter and of which I am using for storage. I also have two SSD's in there for the OS/Apps and a "scratchdrive."

    The other thing I am going to do, is see if getting the Mac Pro off the carpet will make a difference by putting it on a slab of wood from a shelf or something. The Mac Pro is a bit tipsy sitting on the carpet. Not sure if that will make a difference.

    But, thanks for the input!
     

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