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Corsair Obsidian Series 900D Super Tower Case, with Full Windowed Side Panel


CC-9011022-WW(900D) (Corsair / Computer Chassis)

SKU: CC-9011022-WW Category:


Obsidian Series® 900D Super Tower Case 

The Obsidian Series: Designed by builders, for builders.

Obsidian Series 900D is for serious builders with big projects. Do you want to design your ultimate dream PC Add state-of-the-art liquid cooling or air cooling Build a quadruple GPU, dual CPU graphics powerhouse Or, just create a monster file server

If these are the kinds of questions you’re asking yourself, you need a 900D.

Serious Expansion Flexibility for Serious Builders 

We don’t need to tell you that there’s no such thing as too much room. We’ll just let the numbers speak for themselves:

Ten expansion slots.

Fits up to nine hard drives or SSDs, with three hot-swap mounts.

Four 5.25” optical drive bays.

Room for dual power supplies.


And if nine hard drives or SSDs aren’t enough, you can expand to 15 drives by adding additional drive cages (available separately).

Incredible Cooling Performance and Potential 

A cooling-optimized case design requires three things: good passive ventilation, flexible fan mounting options for good airflow, and the room to add sophisticated active cooling systems. The Obsidian Series 900D starts with a clear airflow path from the intake fans to the case interior, with no drives in the way. But, that’s just the start.

Includes three AF120L 120mm front intake fans and one AF140L 140mm rear exhaust fan.

15 total fan mount locations.

Five radiator mounting points.

Four removable dust filters.


Easy to Build With. Easy to Live With. 

System builds should be straightforward and easy, without your PC case getting in the way. And, reconfigurations and upgrades should be just as simple. An enjoyable build process with great-looking results is a huge part of the pride of ownership that comes with building high-performance PCs.

The 900D can help make it all happen with tool-free side panel access, hard drive installation, and optical drive installation. Inside, you’ll find a CPU backplate cutout and rubber grommets on the cable routing holes. There’s generous cable routing space behind the motherboard tray, and snap-down cable latches help you create clean, easy-to-modify cabling that doesn’t rely on dozens of zip ties.

You also get modular hard drive cages, and the dust filters and fan covers are easily removable for cleaning and maintenance.

Understated Overkill 

Let the beginners use cases that look like they’re going to turn into a giant robot. Obsidian Series 900D is built on a steel and cast aluminum frame, with solid steel panels and a fully painted interior. The brushed aluminum fascia resists scratches and fingerprints, and it’s just plain fun to put your hands on it.


Contents and Specifications 

Package contents 

Obsidian Series 900D Super Tower PC Case.

Quick Start Guide .



ATX, Micro ATX, E-ATX, HPTX, and Mini ITX compatible.


Technical specifications 

Includes three 120mm AF120L and one 140mm AF140L exhaust fan.

Brushed aluminum front fascia with full cast aluminum surround structure front and rear.

Five radiator mounting points: Front: up to 360mm.

Top: up to 480mm (4 x 120) or 420mm (3 x 140).

Bottom side one: up to 480mm (4 x 120) or 420mm (3 x 140).

Bottom side two (with PSU installed): up to 280mm (2 x 140) or 240mm (2 x 120).

Rear: 140mm or 120mm.


Up to fifteen total fan mount locations.

Nine tool free 3.5” and screw-in 2.5” combo hard drive bays for maximum storage, upgradable to fifteen total (requires purchasing two additional cages).

Four tool-free 5.25” drive bays.


Dual USB 3.0, quad USB 2.0 front panel I/O.

Tool free side panel access to top panels..

Magnetic latch bottom HDD/Radiator chamber access with swing-out doors..

Full side panel window.

Removable lower rad covers allow you to customize between cooling and clean, refined appearance.

Three hot-swap bays integrated into one of three included modular hard drive cages.

Ten expansion slots for multi-GPU dream systems.

Dual PSU bays.

CPU backplate cutout and rubber grommeted cable routing holes.

Easily removable dust filters and fan covers.

Snap-down cable routing latches and extra routing space behind the motherboard tray.

PSU – ATX (not included).




Corsair is a computer company that is covers a vast industry of computer peripherals, computer hardware, computer storage and computer memory. The company’s headquarters is located in 47100 Bayside Parkway Fremont, California, U.S. The company was founded in January 1994 and was reincorporated in Delaware in 2007. The current CEO and president of Corsair is Andy Paul with their website is Their contact number is +1 510-657-8747. Their products are USB flash drives, CPU and memory cooling, computer cases, ATX power supplies, DRAM modules, game peripherals and audio peripherals. The company however has a production facility in Taiwan which they use to assemble, test and package their products for distribution in centers like the United States, Europe and Asia. They also have marketing and sales offices throughout the USA, Europe and Asia. As of 2012, Corsair had a total 800 employees and a revenue of US$ 455.2 million in 2011.