Cosmos S: The S Class for Enthusiast

9 Overall Score
Quality: 9/10
Design: 9/10
Performance: 8/10


Well, there you have it. We were a day or two late from when Cooler Master lifted the NDA; however, we wanted to give a worthy review to a worthy case. As has been common through this review, we often make reference to the Cosmos S to the Cosmos 1000. Comparing and contrasting these two cases it is clear, the Cosmos 1000 case is built to be quiet which likely makes trade-offs in overall air flow comparatively speaking, while the Cosmos S trades some noise dampening features for highly efficient cooling and ample air movement through the case.

It has been a pleasure working with this case. If your purchasing criteria is a light weight case with ample air flow and options for water cooling installation, this case is worth serious consideration. Cooler Master has always produced high quality parts for the enthusiast, and the Cosmos S is no exception, the build quality is superb and the roominess inside makes it easy to work in. The exterior design is smooth and stylish, though the bars at the top and bottom are more eclectic than your standard fair, they do add a certain pizzazz to the overall appearance while also providing some key functionality. It is hard to find negatives about this case, though reviewers should always provide constructive feedback to companies who ask that their product gets reviewed, as such we will do so. First, a quick glance over the website and retail sites did not reveal any extra drive bay/HD cages for sale, we would suggest Cooler Master offer, as an optional accessory, HD cages to add either HD space or extra front mounted intake fans. Second, if routing cables such that they extend over the cross bar that latches the panels will result in a situation which prevent the panels from closing, we ran into this problem when trying to cleanly route the 12 VDC CPU cable as it was a bit difficult to manage. Prehaps moving the grommet on the CPU side of the motherboard plate to accommodate the 12 VDC power cable would eliminate this tedium. Finally, the HD cage is a very tight fit, and can be a bit cumbersome to manipulate.

Company: Cooler Master
Product: Cosmos S
Website: Cooler Master


  • Excellent air flow and cooling
  • Light weight (for a full tower)
  • Ample room and excellent cable management systems
  • Easy access and unique ‘off the floor’ design
  • Plenty of options for good cable management.
  • Stylish


  • 12 VDC cabling to the CPU power can be tricky, ensure you have a long enough cable and be prepared to fish it around to avoid problems replacing the side panel.
  • No apparent accessory to add more front intake or extra drive cage (this may exist, but is not immediately apparent, extra cages should be available for purchase)
  • HD cage can be clumsy to manipulate.


  • Quality: 9/10
  • Design: 9/10
  • Performance: 8.5/10
  • Overall: 9/10
  • Awards: XCPU’s Enthusiast Choice Award

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