I have that case and a z87 extreme6. Cpu connects to mobo, you can have up to 2 fans for it, which can be controlled by either PWM or voltage, but speed cannot be controlled separately. Your rear fan connects to either chassis2 or 3, and can be controlled properly. The only issues are that chassis2 seems to not have any kind of control, and if you put the front and top fans in the mobo you loose control of them entirely, they just run at max speed.