Calling Mac Pro owners, coil whine or not?

GearHeadG5

macrumors newbie
Original poster
Nov 29, 2012
17
0
Ok, so I bought a base 2009 quad core Mac Pro on Megamacs website on their black friday sale. I love everything about the mac, except that it emits a weird whine when running and even more so when turned off after having been run. It doesn't make the noise when first plugged in, or when it is sleeping. The frequency is probably a little lower than a dog whistle, so some people i've showed it to can hear it and some can't.

I have done a lot of testing i.e taking out sticks of RAM, removing video card, HD, etc, and have found that it seems to be the PSU or GPU.

My question: Should I try to get a replacement or is it something that is normal with 2009 Mac Pros?
 

ybz90

macrumors 6502a
Jul 10, 2009
609
2
If it's a coil whine, it's almost definitely the PSU. It's an easy test to just take out the GPU.

I don't have any sort of whine with mine, so I think it comes down to whether or not you can live it if there's nothing wrong functionally.
 

pertusis1

macrumors 6502
Jul 25, 2010
425
114
Texas
Nope. They are generally pretty quiet, especially stock. The volume will go up if you add suped up video cards, etc. I would look for a replacement if I were you, although I don't know if they'll send you one for a sound like that if it works well.
 

Gav Mack

macrumors 68020
Jun 15, 2008
2,192
17
Sagittarius A*
The singing capacitor which goes on for a minute or two after switching off?

New PSU most likely required or ask them to exchange it.
 
Last edited:

GearHeadG5

macrumors newbie
Original poster
Nov 29, 2012
17
0
After turning it off, the "coil" whine lasts until I unplug the Mac Pro or turn off the surge protector.
 

MassMacMan

macrumors regular
Jul 12, 2012
171
36
Boston MetroWest
Another base 2009 quad-core chiming in. I have an early 2009, flashed to 5.1, running a hex-core 3.33 CPU, fully tricked out with add-ons, therefore LOTS of power consumption. Never had anything like what you've been hearing.
 

bolandross

macrumors member
Nov 28, 2017
31
33
I had noise problems with my 2013 Mac Pro. The network adapters (ethernet and wifi) both made whine/crackling noises when data was transmitted. I returned it, got a new one, same problem, money back.
 

kohlson

macrumors 68020
Apr 23, 2010
2,383
703
2009 4x2.93, flashed to 5,1. No whine, and I think I am pretty sensitive to these things.
 

William Payne

macrumors 6502a
Jan 10, 2017
931
359
Wanganui, New Zealand.
I just tend to get a quiet fan noise and some hard drive noise. It is noticeable but only if the room is silent. Once you start going about your day and stuff you don't overly notice.
[doublepost=1514059041][/doublepost]What GPU do you have?
 
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mattspace

macrumors 65816
Jun 5, 2013
1,430
1,086
Australia
i get a very quiet hum from the power supply whenever it's plugged in even if the machine's shut down - i've posted about it here before and been told it's normal. What's the power supply standard where you are - 240volt etc? We're on 240 here.
 
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