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Replacing PSU fan with a 4 pin variant

Last response: in Components
February 28, 2010 10:01:57 AM

Hi All,

My PSU fan is now the loudest part of my system so I bought an Akasa APACHE fan to replace it. the problem is it has a 4 pin connector and the PSU only has GND, 12v. I have connected the Ground and 12v wires together and booted. It will only pulse the fan though and wont spin up. Can anyone help??

a c 144 ) Power supply
February 28, 2010 10:11:31 AM

Which pins on the did you use? I think the correct pins on the fan are the ground pin and the wire right beside it.
February 28, 2010 10:15:05 AM

I've tried all four

PSU has;


Fan has;


The pulsing occurs when the blacks are connected and the red is connected to the yellow??
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a c 144 ) Power supply
February 28, 2010 10:27:23 AM

OK. I think I see your problem. You want to connect the fan's yellow and black wires to the PSU's yellow (12 volt line) and black wires. Use a drive molex.
February 28, 2010 10:36:12 AM

I cut the old fan off which was connected with a red and black wire. There is no yellow wire connected to the old fan. Do you mean to splice into a yellow wire exiting the PSU?
February 28, 2010 10:52:57 AM

Just tried it in a molex connector, black to black (GND) yellow to yellow (5v) works. Now how to sort it in the PSU ??? Hmmmmm