Greetings!
You would actually be powering the fans from the motherboard itself, and not the PSU. Your motherboard has 3 case fan connections, which if you just grab some splitter cables (4-pin should do the trick) should have you covered, but with that many fans, you may want to look into a fan hub so that you can plug multiple into one port on the motherboard just to limit the amount of cables in the front of your case.
Hope this helps!