Cooler Master Cosmos S PC Case Review

Posted: Feb 22 2008, 12:00am CST | by , Updated: Aug 10 2010, 9:21am CDT, in Reviews | Computer Hardware


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Features & Specifications
The Cooler Master Cosmos S is a full tower case, so be sure you have the room for it before you buy. The chassis is made from aluminum and weighs about 30 pounds. It’s not a lightweight case that you will want to carry to LAN parties. The Cooler Master Cosmos S has seven exposed 5.25-inch drive bays and four hidden 3.5-inch drive bays converted from three of the 5.25-inch bays.

A total of seven expansion slots are available. The cooling system that comes with the Cooler Master Cosmos S includes one 120mm front fan, one 120mm top fan, and one 120mm rear fan. The left side panel of the case has a very large 200mm fan that spins at 900 rpm and moves 150 cfm. Cooler Master says that standard ATX PS2 PSUs will fit. I was able to get the large PC Power & Cooling 1KW SR TurboCool inside with no issues.

The top mounted IO panel can be hidden with a sliding cover. Connectivity options on the front panel include four USB 2.0 ports, one IEE 1394, one eSATA, one mic, and one audio port. Those who like to show off their gear will be glad to hear an optional clear side panel is available.

In Use
Like the original Cosmos, the Cooler Master Cosmos S has mesh covers for the front drive bays. These give a glimpse into the interior of the case and allow light to spill out from the LED fans and other bling you might put inside. The power switch for the Cooler Master Cosmos S is touch sensitive and positioned below the sliding cover for the IO ports.

The power switch is out of the way enough, but since all you need to do to activate the power button is lightly touch it, you should be careful when using the IO panel to avoid accidentally turning the system off. The case has a very nice looking gunmetal gray and black color scheme. The case is compatible with ATX and Extended ATX mainboards.

The interior of the chassis is very shiny and well laid out. The design used in the Cooler Master Cosmos S puts the PSU at the bottom of the case, which is the same layout that the original Cosmos used for the PSU.

Cooler Master took precautions to be sure that the Cooler Master Cosmos S gets into an owners hands in pristine condition. They pack the case well in a strong box with foam. Cooler Master also went the extra mile and put the case includes a brown cloth bag with a drawstring to keep dust and scratches from marring the surface during shipment.

The side panels of the Cooler Master Cosmos S are easy to remove and require no tools. To remove either side panel all you need to do is press an eject button on the back of the case. The panels pop off the sides and are easy to remove. Inside the case the drive bays are tool less as well. The same locking rails are used in the Cooler Master Cosmos S that owners of the Cosmos are familiar with.

All of the internal edges of the case are rolled and no burs were around in my case to cut fingers during the build. The chassis is very roomy inside; so much space is available that you could possibly have issues with some PSU cables not being long enough. My TurboCool PSU was perfect on cable length, but it has longer cables than many PSUs on the market.




  • Great looks
  • Great cooling
  • Great dimensions


  • Touch sensitive power button could cause issues

The Cooler Master Cosmos S is like the younger, more attractive sister to one of the best looking Pc cases Cooler Master has ever released. If you are a gamer looking for space, looks, and performance the Cooler Master Cosmos S is the case you want.


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The Author

<a href="/latest_stories/all/all/3" rel="author">Shane McGlaun</a>
Leading our review center, Shane McGlaun (Google) knows technology inside out. His extensive experience in testing computer hardware and consumer electronics enable him to effectively qualify new products and trends. If you want us review your product, please contact Shane.
Shane can be contacted directly at




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