yes the 4pin is the 'bigazz connectors'
Usually they it's pass through though so it doesn't actually take up one of your connectors...you plug in a 4pin from the PSU to the fan and the fan has another Male end molex connector to plug into another device. Also some fan controllers are different than others so it depends on whether they take 4pin or 3pin. My sunbean rheobus fan controller uses a 4pin for power and then you plug the fans into 3pin connectors, there's 4 of the pins for 4 differen't channels for fans to be on. at places like www.svc.com
they also have 4pin to 3pin convertors and vice versa
The Sunbeam Rheobus fan controller works great and has 20watt per channel rating. I have a total of 9 case fans spread out along the 4 channels and it handles it superbly so not only can you use the controller to operate any fan you want you can hook up multiples as long as you don't exceed the wattage rating for the channel