Gaming Cabinets

Cooler Master Cosmos II (RC-1200-KKN1) Ultra Tower Case with Metal Body and Hinged Side Panels Gaming Cabinet

  • Stylish and streamlined ra...
  • Brushed aluminum and ste...
  • Airflow optimized design
  • Supports up to 10 fans a...
  • Supports 4 Way SLI/CF
  • View more



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Cosmos II Ultra Tower The COSMOS II Ultra Tower features a streamlined design accentuated by a pair of distinctive handles like no other. The smooth, brushed aluminum touch of the side panels unlock and swing open like the doors of a luxurious race-car.

Hidden behind the front slide cover lies a stack of hot-swappable drive bays. The black interiors provide enough space for over sized XL-ATX System Boards equipped with 4 double width graphics accelerators. A second slide cover on top hides the Advanced Control Panel to manage up to 10 fans and their respective LED lights. The combination of its elegant looks, numerous expansion options and features make the COSMOS II a "Dream Case".

Performance Meets Style

The race-car inspired side panels have become a signature for the Cool Master COSMOS series. COSMOS II delivers a sense of luxury and elegance with its smooth brushed aluminum and steel side panels along with stylish round handrail and stand. By focusing on a "racing", "speed", and "luxury" theme, the COSMOS II not only offered a powerful and efficient system enclosure, but a true piece of art.

Individual Chambers

Individual cooling chambers enable advanced air flow and temperature management. The lower chamber features a second HDD/SSD cage, a dual fan bracket, extra long PSU rail, and enough space for a water cooling radiator.

Water Cooling Support

The retention holes for water tubes at the rear of the case and reserved space and mounts for water cooling radiators allows easy liquid cooling set up and maintenance.

Great Expandability

Ample inner space can support super high end extra wide and long XL-ATX mainboards, 4 extra long high end dual-width VGA cards (up to 385mm) or 2 super high end triple-width VGA cards, extra long PSUs (up to 250mm), and accommodate up to 13 HDDs or SSDs with ODD, HDD and SSD hot swapping.

Fan Array with Removable Dust Filter on Vents

COSMOS II supports up to 10 fans (5 pre-installed) that can be arranged into 4 separate fan management groups. The fan speed and LEDs can be managed using the advanced control panel at the front of the case. Clip on air filters protect the system from dust blocking heatsink and fans, prolonging the system lifespan.

Advanced Control Panel

The top control panel offers easy access to fan management and fan LED on/off switch. Enjoy hassle-free, high speed connection to a variety of peripherals with one e-SATA connector, two USB 3.0 ports, four USB 2.0 ports and audio in and out jacks on the upper I/O panel.

The images only represent actual products. The colours may vary or differ slightly.



  • 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
  • Advanced Control Panel
  • 4 channel fan speed control
  • I/O USB 3.0 x 2, USB 2.0 x 4, e-SATA, Fan LED on/off switch

Technical Specifications

Model RC-1200-KKN1
Available Color Midnight Black
Materials Exterior : Aluminum, Mesh, Synthetics
Interior : Steel-Alloy, Synthetics, Rubber
Dimensions (W x H x D) 344 x 704 x 664 mm / 13.5 x 27.7 x 26.1 inch
Weight 22 kg / 48.5 lbs
5.25" Drive Bays 3
3.5" Drive Bays 13 (2 from X-dock with key locks, 5 HDDs in the Middle cage, 6 HDDs in the bottom cage)
2.5" Drive Bays 11 (converted from 3.5" cages)
I/O Panel USB 3.0 x 2, USB 2.0 x 4, e-SATA x 1, Audio In & Out
Expansion Slots 10+1
Cooling System Top : 120mm black fan x 1, 1200 RPM, 17 dBA
(or 200mm fan x 1 / 140mm fan x 2 / 120mm fan x 3)
Front : 200mm LED fan x 1, 700 RPM, 19 dBA (or 120/140mm fan x 1)
Rear : 140mm fan x 1, 1200 RPM, 19 dBA
Side : 120mm fan x 2 (optional)
HDD : Mid.HDD : 120 x 25 mm fan x 1 (optional)
Bottom HDD : 120mm fan x 2, 1200 RPM, 17 dBA
Power Supply Type ATX PS2 / EPS 12V
Maximum Compatibility CPU cooler height : 190mm / 7.48 inch
VGA card length : 385mm / 15.15 inch


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excellent Review by Devendra
I liked it...excellent finishing, solid build and very light in weight. very well marked cables and good space inside.
this is value for money case. December 6, 2017
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