The New Guy wrote:
>> 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.
Err...right. Considering none of the replies were really relevant,
that's why I started fresh. Some call it 'netiquette'.
> But I'm going to guess that you replaced a fan and now its
> still loud.
It was somewhat quieter, but not dramatically so. With the resistors in
place it's a lot quieter. Still a bit of whine though, some of which is
coming from the hard drive as it turns out.
> Look at the mounting points and see if you feel any
> vibration. If so, try mounting on rubber or nylon washers.
That's the next step.
> But the
> real solution for noise with most computers and power supplies is to
> simply remove the power supply completely from the box,
Not really a solution I'm prepared to attempt.
> 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.
?? The power supply in question runs 2 60mm fans side by side, which
blow air into the front of the power supply. There are no 'wires' to
choose from, merely 2 prong connectors that moulded plastic connectors
slide onto.
> 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.
I can only assume you've not looked inside a MDD PowerMac.
> If that model uses the big 5" fan on the side wall, disable it.
See above.
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.
No offense, but that sounds like an utterly ****house solution. The CPU
heatsink has a 120mm fan (next on the replacement list) which has it's
speed controlled by a temperature sensor.
Andy.
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