A little clarification. What you want is called an ARGB Hub, as Karadjgne has told you. It is used only with the ARGB lighting parts (and cables) of the ARGB fan. The motor part of each is powered and controlled with a separate cable from the fan. It is the motor that gets the PWM speed control signal from a mobo fan header. (And you may well need a FAN Hub to connect that many fans to mobo headers - depends on how many fan headers your mobo has.) Anyway the ARGB Hub will need connections to a SATA power output from the PSU to get power for all the lights, and to one mobo ARGB header to pick up the digital control signal for distribution to the lights.
Here is an example of such a Hub with eight outputs. It can be used as I said above...