channels total. There's a single 3-pin connector for the two 120mm side fans, 1 3-pin connector for the side 200/230mm fan, 1 3-pin for the front 140mm fan, 1 3-pin for the rear exhaust and one single 3-pin for the two top 200mm fans.
That's by default; I'm not sure about the splitters.
And, in case you're wondering, the case comes with the top 200mm blue LED fan, the rear fan and the two side 120mm fans included. If you're getting more fans for the case, try to get NZXT fans, because there's at least a known issue with a side 200mm fan, since the mounts for it are actually 192mm and only the NZXT