how can I connect 3 pin fan to power supply?

[eclipsebmx]

I have 4 pin atx ( it has 2 by 2 pins in a square formation,not rectangular 4 pins next to each other) coming from psu and want to use it to power dual fans that have one 3 pin cable. How do I do it ? What adapter do I use?

 

[cin19]

The 4pin atx is for the MB power connector.
You need something like the 4-pin Molex to 3-pin adapter.
http://www.universalpart.com/Fan-Molex-To-3-Pin-4-Pin-To-3-Pin-Mb-FA-4-3_item_5287.html
or http://www.avadirect.com/product_details_parts.asp?PRID=12965

Then you can plug the fan into the PSU 4pin molex.

 

[cklaubur]

Your computer boots without the 4-pin ATX connector plugged in?

Technically, that connector's not meant to power fans, so there isn't an adapter to connect anything to it. However, there are adapters available to connect a 3-pin fan connector to a 4-pin Molex.

Casey

 

[eclipsebmx]

Your computer boots without the 4-pin ATX connector plugged in?

Technically, that connector's not meant to power fans, so there isn't an adapter to connect anything to it. However, there are adapters available to connect a 3-pin fan connector to a 4-pin Molex.

Casey

I have two cables one is connected to mobo and another isn't connected to anything. I dont think I have free Molex socket on power supply. How else could I connect the 3pin fan? I don't have free slots on mobo

 

[eclipsebmx]

The 4pin atx is for the MB power connector.
You need something like the 4-pin Molex to 3-pin adapter.
http://www.universalpart.com/Fan-Molex-To-3-Pin-4-Pin-To-3-Pin-Mb-FA-4-3_item_5287.html
or http://www.avadirect.com/product_details_parts.asp?PRID=12965

Then you can plug the fan into the PSU 4pin molex.

I ordered one yesterday so I will try this.thnx