The CORSAIR iCUE 4000X RGB is a distinctive and customizable tempered glass mid-tower ATX case with easy cable management and exceptional cooling, with three included CORSAIR AirGuide RGB fans. The CORSAIR iCUE 4000X RGB is a distinctive and customizable tempered glass mid-tower ATX case with easy cable management and exceptional cooling. Two tempered glass panels and dedicated front ventilation channels combine to offer great looks and airflow, accompanied by three included 120mm AirGuide RGB fans that concentrate cooling and illuminate your system. CORSAIR RapidRoute design makes it effortless to route major cables through a single channel.