Corsair Obsidian 900D incl. Window

If these are the questions you ask yourself then the 900D Series is just right for you. 
 
High expandability for demanding system builders 
That it does not really exist too much space, you probably know yourself We let the numbers speak for themselves.: 
Ten Expansion Slots 
Space for up to nine hard drives or SSDs with three hot-swap bays 
Four bays for optical 5.25-inch drives 
Space for redundant power supply 
And if you are not yet nine hard drives or SSDs enough, you can add them by adding additional drive trays (available separately) extend to 15. 
 
Unique cooling performance and premium cooling potential 
For a housing design with optimum cooling, there are three requirements: a good passive ventilation, flexible options for fan fixtures and plenty of space for adding the latest active cooling systems. Obsidian Series 900D starts an undisturbed flow of air is interrupted between the input fans and the housing interior by any drive. But thats not all. 
Three AF120L-120-mm fan input on the front and a AF140L-140mm output fan on the back 
15 fan mounts  
Five radiator mounting points 
Four removable dust filter 
 
Easy installation and maintenance 
Systems should be straightforward and easy to use from your PC case not be restricted. Reconfigurations and upgrades should be also carried out easily. The pride of the owners of self-built high-performance systems based above all on the fun at work and the visually stunning results. 
The 900D Series is characterized by tool-free removable side covers and also tool-free installation of hard drives and optical drives. Inside you will find an opening in the CPU back panel and rubber-clad cable management openings. The space for cable routing behind the motherboard was generous, and thanks to the cable management with snap lock you can make a simple cable system that can be adapted easily and does not rely on dozens of cable ties. 
They also come with a modular hard drive carriers, and both the dust filter and the fan covers can be removed easily for cleaning or maintenance purposes. 
 
subtle look 
Housing that look like blocks for giant robots, you should let beginners. When Obsidian Series 900 is a construction of steel and cast aluminum with sturdy covers and full interior painting. The front cover of matt aluminum prevents from scratches and fingerprints, so touching is not only allowed, but even fun. 
 
Specifications 
Includes three 120-mm fans (AF120L) and one 140-mm fan output (AF140L) 
Front cover made ​​of matte aluminum with sturdy cast aluminum frame on the front and back 
Five cooler fittings: 
Front: up to 360 mm 
Top: up to 480 mm (4 x 120) or 420 mm (3 x 140) 
Bottom 1: up to 480 mm (4 x 120) or 420 mm (3 x 140) 
Bottom two (with AC adapter): up to 280 mm (2 x 140) or 240 mm (2 x 120) 
Rear: 140 mm or 120 mm 
Up to 15 fan mounts 
Nine hard drive bays for the partially tool-free installation of 3.5-inch and 2.5-inch drives; can be combined with two additional slots to expand 15 
Four tool-free 5.25-inch drive bays 
Two USB 3.0 ports and four USB 2.0 I / O ports on the front 
Tool-free access to the upper side cover 
Access to disk / shaft cooler about openings with magnetic closing mechanism on the underside 
Side panel with window 
Removable lower radiator covers allow you to choose between uncompromising cooling and clean, elegant design. 
Three hot-swap drive bays in one of the three supplied modular mounts 
Ten Expansion slots for systems with multiple graphics processors 
Two power supply fan 
CPU-opening in the rear wall and rubber-clad cable management openings 
Easily removable dust filter and fan covers 
Cable management with snap lock and place for neat cable arrangement behind the motherboard 
ATX power supply (not included) 
Compatible with ATX, Micro-ATX, E-ATX, and Mini-ITX HPTX 

Scope of delivery: 
Obsidian Series 900D Super Tower PC Case 
Quick Start Guide