The 300R provides a remarkable number of features in a compact chassis. Easy access, lots of room for expansion, and superior cooling make the 300R a great choice for building powerful PCs that don't take up a lot of room. Supports dual fans on the front, top and side as well as a rear 120mm fan for superior airflow. The 300R also has support for huge graphics cards up to 450mm in length, supports 2.5" or 3.5" drives with multi-purpose tool-free brackets and excellent cable management features.