A fully-featured full tower for real builders - The Obsidian Series 800D full tower chassis is designed from the ground up with enthusiast builders in mind, the 800D features a number of customizations that make building a high performance PC easier than ever. A four-drive SATA hot-swap drive bay sits in the front of the case, making it easier to install or swap hard drives on the fly. A unique cable routing system virtually eliminates cable clutter that can impede airflow. Three separate cooling chambers provide optimum isolated cooling zones for your hard drives, graphics cards, and power supply. All this is quietly cooled by three included 140mm fans, with room for up to four more 120mm fans, including the triple 120mm radiator friendly topexhaust panel.