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32,000.0042,599.00 (-25%)

  • Stylish and streamlined race-car inspired design
  • Brushed aluminum and steel for strength and elegance
  • Airflow optimized design
  • Supports up to 10 fans and 13 HDDs (2 from X-dock)
  • Supports 4 Way SLI/CF
  • Supports XL-ATX / SSI CEB / SSI EEB boards

The Ultra Tower


Curved Tempered Glass


Ever since the launch of the original Cosmos II, fans have been asking, or making by themselves, for a windowed side panel.
Cooler Master has accepted the challenge and to celebrate the 25th anniversary we have released this special edition.For this special edition we even take it a step further:
Both sides come with beautifully crafted curved tempered side panels that blend seamlessly with the sophisticated contours of the case.

A Legacy of Aluminum

The first aluminum chassis was made by Cooler Master under the ATCS series. This 25th anniversary edition of Cosmos II is paying its tribute by changing the M/B Tray & Partition Plate to aluminum. Plus it adds a touch of premium.

Aluminum Motherboard Tray with black rubber grommets

Aluminum Partition Plate with black rubber grommets

Sturdy Steel Frame

A Touch of Premium

This special edition features an updated design with two distinctive brushed aluminum handles and a soft brushed aluminum sheen on the front and top panels. The top slide panel covers the Advanced Control Panel and hidden behind the front slide panel lies a stack of hot-swappable drive bays.

  • 1. Solid brushed aluminum handles
  • 2. Solid brushed aluminum covered top
  • 3. Solid brushed aluminum front panel

Blue LED Ambient Lighthing

When thinking about the cosmos, the color blue will spring to mind. Blue is also the color first used in our chassis. This chassis will bring back that feeling and it will emphasize the beauty of your components with a discrete blue glow from the front LED fan and strip displayed through the tinted tempered glass panels.

Streamlined Airflow

Individual cooling zones make sure you have an improved thermal management and a streamlined airflow. With a 200mm blue LED fan in the front and a 120mm fan in the back you are already certain from a quiet cooling performance.

Additional information

Weight25 kg
Dimensions66 × 69 × 32 cm


Product NameCOSMOS II 25th Anniversary Edition
Model NumberRC-1200-KKN2
Available ColorSilver / Black
MaterialsAppearanceAluminum, Mesh, Plastic
BodySteel, Aluminum
Side panelGlass
Dimensions (L x W x H)664 x 344 x 704 mm / 26.1 x 13.5 x 27.7 inch
Motherboard SupportMicro-ATX, ATX, E-ATX, XL-ATX, SSI CEB, SSI EEB
Expansion Slots10+1
Drive Bays5.25″3
3.5″ HDD13 (2 from X-dock with key locks, 5 HDDs in the middle cage, 6 HDDs in the bottom cage)
2.5″ SSD11 (converted from 3.5″ cages)
I/O PanelUSB 3.0 x 2, USB 2.0 x 4, Audio In / Out
Fan SupportTop120mm fan x 1 installed (optional: 200mm fan x1 / 140mm fan x 2 / 120mm fan x3
Front200mm LED fan x 1 installed (optional 120/140mm fan x 1)
Rear140mm fan x 1 installed (optional: 120mm fan x 1)
HDD120mm fan x 3 (2 fans for bottom HDD / 1 fan for middle HDD (optional))
Liquid Cooling SupportTop240mm/280mm radiator (max 320mm radiator)
ClearanceCPU Cooler190mm
Power Supply SupportATX PS2/EPS 12V (optional)
EAN Code4719512057445
UPC Code884102031076
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