Cm 690 iii is a revolutionary update to the popular cm 690 ii mid towers the exterior retains the curved metal mesh look the series is known for the interior has been completely updated the hddssd combo cage can be switched between 35 inch or 25 inch drives by adjustable trays without any screw there39s enough room for a 240mm liquid cooling radiator at the top or front 120mm in the rear and supports up to 9 fans including 3 large 200mm fans for extreme airflow and cleaning is hassle free th