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Cooler Master Launches COSMOS II 25th Anniversary Edition

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Cooler Master, a leader in design and manufacturing computer components and peripherals, today announced the launch of a new model in the COSMOS line. To celebrate Cooler Master’s quarter-century birthday, the brand introduces the COSMOS II 25th Anniversary Edition. A tribute to Cooler Master’s original and iconic COSMOS case.

Community commitment: curved tempered glass side panels

Ever since the launch of the original COSMOS II, fans all over the World have been asking, or even making their own, windowed side panel for the COSMOS II. Well, Cooler Master heard you and we wanted to add a little flourish: the COSMOS II 25th Anniversary Edition comes with two curved tempered glass side panels out of the box!
Innovation is Cooler Master’s legacy, brought to life once more with these massive tempered glass panels, the first of their kind. These beautifully crafted panels blend seamlessly with the sophisticated contours of the case and give a smooth look inside the case to show off your build. In true COSMOS fashion, they unlock and swing open like luxury car doors.

For current COSMOS II owners, the good news is that these panels will be also available as a separate retail product, starting from the third quarter of 2017. 

A Legacy of Aluminum

Almost 20 years ago, at a time when the PC case industry was a sea of beige, Cooler Master proved that cases need not be boring and started a trend that continues till this day. Back in 1999, Cooler Master was the first case manufacturer to launch a full aluminum chassis on the market: ATC-100. This legacy is integrated in the design of the COSMOS II 25th Anniversary Edition.

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.

Moreover, the case has been updated with an aluminum motherboard tray and partition plate for an even more premium feel.

Blue LED ambient lighting

When thinking about the cosmos, the color blue might spring to mind. The COSMOS II 25th Anniversary Edition with pre-installed 200mm blue LED in the front and the magnetic blue LED strip allows you to show the beauty of your components with a discrete blue glow, displayed through the tinted tempered glass side panels. The lighting will give your whole system a softer, cooler outlook.

Performance and Elegance all in one case

The whole design follows the COSMOS tradition of providing the best performance, which is why the front and top areas come with high airflow mesh. The spacious interior gives you plenty of installation options and serious gamers need not worry: all available graphic cards on the market are supported, in multiple setups. Last but not least, the stylish Advanced Control Panel gives you full control of the fan speed to balance your performance and turn on/off the LED lighting of the fan based on your preference.  

Pricing & Availability

The COSMOS II 25th Anniversary Edition is expected to be available at your favourite retailers and etailers for a suggested retail price of £299.99. For more information, please visit

About Cooler Master:

Cooler Master is a Taipei-based, global computer components company with more than 20-year track record in releasing innovative products that truly advance the industry. We are driven by a passion for the things that make building a PC such a unique, rewarding experience, and sustained by a vision that we can reinvent the way these machines are designed, made and used. From our landmark release of the first ever aluminum PC case to our groundbreaking switch to the modular format, Cooler Master is committed to bringing our customers and fans the utmost in choice and control. For more information on Cooler Master, please visit or follow us