The fans have 3-pin connectors built to be plugged into a fan controller or the motherboard.
If you need an adapter because your motherboard doesn't have enough connectors - you'll be looking at a '3-pin to molex' adapter. (fan -> 3-pin -> molex -> psu)
Cooling should be sufficient.
would this be what im looking for?: http://www.newegg.com/Product/Product.aspx?Item=N82E16812200855
and if it is, how many do i need?