Thermaltake The Tower series has been iconic for its vertical body designs and the Tower 300 follows in those footsteps. However, with its new octagonal prism design we were able to not only increase the viewing areas for the components inside but also allow for better airflow and bigger cooling options too. It can support up to a 420mm AIO radiator on the right side along with a total of up to eight 120mm or 140mm fans. This gives the Tower 300 the classic looks of its predecessors but with even better performance and updated styling.