i am buying a new case the cooler master elite 430 and my mobo there is only one fan connector and its a 3 pin one and all 4 fans are 3 pin one so i dont know what should i use to connect all 4 to the mobo. Please help. Thanks.
You could use something like a daisy chained Y-cable or something like this (although overkill) - http://www.swiftech.com/8-WayPWMsplitter.aspx you would be sure you won't be overloading the motherboard header due to the hub being powered via molex, the 4 pin header would also just plug into a 3 pin header on your motherboard.