(1)Improved daisy chain design, only 2 cables to a controller are needed for the standard setup. (2)One cluster of a controller is up to 6 fans, total are 16 fans. (3)Keylock style removable daisy chained block to improve compatibility with radiator. (4)Slimmer cable connector design provides seamless Look and better compatibility. (5)Add side lighting strips to provide a better side aesthetic. (6)Support fan RPM start/stop for a quieter environment.