Originally, the Obsidian series cases were large full-towers, consistently developed as cases for extreme high-end hardware. The current culmination of this development was the Obsidian Series 900D: a double chamber case which could effortlessly accomodate HPTX motherboards, and even a powerful...
high cooling performance with three pre-assembled fans; four cooler spots; modular HDD/SSD cage; plus two 2.5" drive bays behind the mainboard; tool-free installation for expansion cards and all drive formats (2.5" only behind the tray; all three dust filters can be cleaned quickly; generously-sized...
noise level; material thickness not meeting the premium standards of the series; not enough space for some high-end tower coolers