If its connected to the motherbd then you can usually control it thru the bios of fan controller software. If its connected to the power supply then you will need to install a fan controller and connect it to that.
I think it's connected with a 4 PIN..
But with witch program? speed fan isn't doing anything, i can't change it in the bios because it just shows me it's running on 3012 Db and ican't change it or i don't know why :s