Replacing an desktop G4 internal fan by
a noiseless one (Enermax UC-12FAB model)
As usual, I cannot be responsible for any damage to your
machines when you will experiment the following tutorial.
It is the follow-up file of silence
in the gigabit G4 (only in french). Noise was still too
loud, so I decide to replace one of the most noisy piece of
a computer: the fan
I choose the Enermax UC-12FAB model, even if it is not
the most quiet modell, but because I can change its speed
through a potentiometer..and because this model is easy to
However, its price can vary from simple to double: so
several phone calls to retailers can lower the bill !
([UPDATE] 17 December 2003) On the other
side, here is a comparison between 27 fans (of 120 mm
I remove the fan's support as in silence
in a B/B G3 points 3, 4, 5 and 6.
Before removing the culprit, I had tested the CPU
temperature (ThermoInDock software for X or GaugePro for OS
9 and earlier).
This temperature raised up to 40 Celsius degrees just before
I operate the fan.
Oncee the fan removed, I put my little home-made noise
And the new beast. Power will be taken on the hard disk
I do not use the original screws to fix it back but I use
nylon screws (thanks John): this kind of screws less
I set up the potentiometer for the fan to maintain an
internal temperature of 35 Celsius degrees. -> not only
is this fan really noiseless but it cools the machine better
than the Apple original one!
So, I also shutdown my Radeon graphic card fan.
What a difference!!!
Well this G4 is still noisy compared to my iBook; but now it
As usual, follow these steps in a reverse order to
rebuild the G4.