> Well...to update...they're in.
> It's made _some_ difference, but I think I'm going to have to solder a
> resistor in there somewhere to slow them down a touch.
Andy, try not to cut off the previous posts that are obviously
relevant. But I'm going to guess that you replaced a fan and now its
still loud. Look at the mounting points and see if you feel any
vibration. If so, try mounting on rubber or nylon washers. But the
real solution for noise with most computers and power supplies is to
simply remove the power supply completely from the box, then turn the
80 mm fan around so its blowing in, not out. Then power it from the
red and black wires (which will give 5 volts), not the yellow and
black wires which give 12 volts. It will run at a much slower speed
but since you're using cooler external, room temperature air to cool
the power supply heatsink, you don't need to run it at the higher rpm
speed from 12 volts. It will be almost inaudible. WAY quieter than
at 12 volts.
If that model uses the big 5" fan on the side wall, disable it. Its
noisy and useless. Then get an 80 mm or larger fan (whatever size is
necessary to cover the CPU heatsink, and run it at 5 volts (red and
black wires. To keep the case from heating up, just leave it ajar
about an inch. The heat will escape easily. But watch for dust. It
might be wise to place it under a shelf as long as there's good
ventilation.
Now you'll have a Mac that is almost inaudible and runs way cooler
than before. So it should server you far longer than the original
design.
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