Diode to reduce fan speed?

[johnv466267]

Hi guys,

i bought a second hand modular hx650 corsair power supply off craigslist.
It works but it is extremely loud. (Jet engine loud)

Has anyone tried wiring in a diode on the fan circuit to reduce the fan speed?
Thanks

 

[Ironsounds]

Hello... what voltage and current RPM rating is on the label... Just take a picture will work too B )

 

[JackNaylorPE]

The cooling system in a PSU is designed to keep the components from failing ... messing with this in any way is an invitation to a toasted PSU.

 

[McHenryB]

I believe that it's a resistor rather than a diode. I use one to reduce the fan speed slightly, and the noise significantly, of the case fan in one of my computers. Obviously you would monitor CPU and system temperatures after doing this; it can be a very effective way of silencing a computer.

 

[johnv466267]

I'VE FOUND THE ANSWER. I LOOSENED THE POWER SUPPLY SCREWS A LITTLE AND THE FAN IS SILENT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
THANKS GUYS! ALL ARE APPRECIATED!

 

[johnv466267]

Hello... what voltage and current RPM rating is on the label... Just take a picture will work too B )

found solution - loosen psu screws

 

[johnv466267]

http://forum.corsair.com/forums/showthread.php?t=144044

this is where i found the answer - it worked for me. hopefully it'll help others out there

 

[johnv466267]

I believe that it's a resistor rather than a diode. I use one to reduce the fan speed slightly, and the noise significantly, of the case fan in one of my computers. Obviously you would monitor CPU and system temperatures after doing this; it can be a very effective way of silencing a computer.

Lol - It turns out my psu screws were too tight. I loosened them and the psu fan noise is gone!

 

[Ironsounds]

Hello... The First thing IS Investigation... To put your hands, eyes, ears, smell on the Problem... BUT!!! AVOID Taste B ( on it before crying help... B D that's why I Ask for a pic...

 

[Doramius]

"Sounds" like you found your answer. Tight screws on some builds can yield the motor to vibrate other components and possibly rub up against, thus creating your 'noise'. However, for anyone wanting to reduce the speed or provide more control over your fan, a 1/4W variable resistor will work great. The resistance would depend on the fan, however, a 100-Ohm variable resistors should fit most occasions.