Well, you can connect 4 of those fans onto the Mobo's 2 PWR_FAN & 2 CHA_FAN headers. The three others could be connected to the PSU using a Molex converter or by getting a Fan Controller Bay and connecting them to it.
I think that case is already equipped with a fan controller.... well you can connect 2 More of those fans on that controller
So out of 7 Fans 6 can be connected, you can also Connect 1 fan to the CPU_OPT Fan connector if you are not using it for any other thing.
SO that makes all 7 fans, with 7 connections in that case with that mobo.