Here's a simple way to quiet down noisey fans...
The values given will only take a couple of hundred RPM off most fans, but that's usually enough to quiet them down considerably. As a plus, this circuit will give your fans a full power "kick start" to ensure they spin up every time.
<pre> 1) Cut the Red Wire on the fan and strip the wire ends...
2) Build this small circuit into the red wire...
____________
_______|10 ohm 2watt|______
To Fan | |____________| | To Motherboard
---------| ____________ |-----
|______|100uf 16volt|______|
|____________|+
3) Solder all connections.
4) Trim off excess part leads.
5) Cover with electrical tape.
</pre><p>Parts ...
1 - 10 Ohm 2 watt resistor,
1 - 100 Microfarad 16volt Capacitor
6" - Electrical tape.
You can vary the resistor if you like... 16 ohms will make it even quieter, but I don't suggest going beyond 20 ohms.
Increasing the value of the capacitor to 220 microfarads will give a bigger kick start to the fans, but 100 is adequate in most cases.
Total cost... less than a buck.
(sorry about the lousy graphics...)
The values given will only take a couple of hundred RPM off most fans, but that's usually enough to quiet them down considerably. As a plus, this circuit will give your fans a full power "kick start" to ensure they spin up every time.
<pre> 1) Cut the Red Wire on the fan and strip the wire ends...
2) Build this small circuit into the red wire...
____________
_______|10 ohm 2watt|______
To Fan | |____________| | To Motherboard
---------| ____________ |-----
|______|100uf 16volt|______|
|____________|+
3) Solder all connections.
4) Trim off excess part leads.
5) Cover with electrical tape.
</pre><p>Parts ...
1 - 10 Ohm 2 watt resistor,
1 - 100 Microfarad 16volt Capacitor
6" - Electrical tape.
You can vary the resistor if you like... 16 ohms will make it even quieter, but I don't suggest going beyond 20 ohms.
Increasing the value of the capacitor to 220 microfarads will give a bigger kick start to the fans, but 100 is adequate in most cases.
Total cost... less than a buck.
(sorry about the lousy graphics...)