Introducing the new generation of iconic cm 690 series ndash cm 690 iii 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 ndash 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 fan