Fractal Design FD-CA-DEF-XL-R2-BL Define XL R2 Black Case High density noise-reducing material for an optimal silent case Patented ModuVent design allowing the user to choose between optimal silence or maximum airflow The case can fit water cooling equipment in the front top rear and bottom without major modifications. Both HDD cages can be removed or repositioned - Top HDD cage can be removed or repositioned for increased airflow whereas bottom HDD cage can be repositioned further into the case to allow for front radiator mount.