New PSU fan installation question.

[powermi]

Hi Folks. i am looking for changing the PSU fan in my QS powermac. And i wonder if there is any difference between plug it on the 3 pin PSU bracket or to any standard 4 PIN, like the hard-disks. seems to be easier to just use the 4 PIN connector, cause the 3 seems not to mach properly with the fan.

cheers.

 

[ctmpkmlec4]

Hi Folks. i am looking for changing the PSU fan in my QS powermac. And i wonder if there is any difference between plug it on the 3 pin PSU bracket or to any standard 4 PIN, like the hard-disks. seems to be easier to just use the 4 PIN connector, cause the 3 seems not to mach properly with the fan.

cheers.

I suggest you use a fan which already has the 3-pin connector.

 

[MatthewLTL]

Hi Folks. i am looking for changing the PSU fan in my QS powermac. And i wonder if there is any difference between plug it on the 3 pin PSU bracket or to any standard 4 PIN, like the hard-disks. seems to be easier to just use the 4 PIN connector, cause the 3 seems not to mach properly with the fan.

cheers.

It is really your choice. Question is do you want it controlled or uncontrolled? If you use a 3 pin connector (any PC Case fan should work) you might have to chop the connector and rearange the wires to make it work. If you do 4 pin the fan will be running at 12V at ALL times so make sure you dont get a loud one. a fan between 30 and 80CFM will not be that loud. I have had to replace PC fans by powering it via Molex because the power supply's internal plug died. I even had one PSU Die because the fan seized up.

 

[powermi]

thanks, so as i see.. 3 pin is going to be controlled. So it would be more quiet then to plug in to the PSU board.

 

[MatthewLTL]

thanks, so as i see.. 3 pin is going to be controlled. So it would be more quiet then to plug in to the PSU board.

Yes, exactly.