Here's your answerhttp://www.newegg.com/Product/Product.aspx?Item=N82E16811984004
Connect your CPU cooler to 1st PWM header
Be advised, a 4 pin mobo CHA header does not necessarily mean the header is PWM.... on Z87, definitely not .... on Z97 most likely yes.
Connect this bugger to your 2 nd PWM header
Connect all your 3 pin fans to the hub