Hi, I have a question. I already bought a case model Corsair 760T and I'm planning to get gabtye 990fxa ud3 mobo. I noticed that it only has 2 system fans (1 & 2 and pwr fan). How can I use the 2 front fans and the rear one if it only has 2 system fan? Do I sue the pwr fan? is there a specific connected I need to utilize all fans???