Replacing PSU fan with a 4 pin variant

[ianmason]

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??

Thanks

 

[jsc]

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.

 

[ianmason]

I've tried all four

PSU has;

Red
Black

Fan has;

Black
Yellow
Green
Blue

The pulsing occurs when the blacks are connected and the red is connected to the yellow??

 

[jsc]

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.

 

[ianmason]

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?

 

[ianmason]

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