Features & Specifications
Like the Stacker series of cases from Cooler Master that I have reviewed before, the Cooler Master COSMOS ships in a very large box. Once extracted from the packaging, the case is well protected with scratch resistant film on the shiny black front bezel and plastic is wrapped around the skids/hand holds that are on the top and bottom of the case. The COSMOS actually sits on the lower skids so there is ample room for airflow under the case even when used on thick carpeting.

On the bottom of the case are a couple trap doors that appear to be there to make it easy to clean lint and grime off the outside of the bottom case fan. Unlike the Stacker case my computer is in now, the Cooler Master COSMOS is a well insulated design for both noise and heat. Each of the pop off side panels has sound deadening material pre-installed to reduce noise.

As soon as you pop the side panels off you notice a large black plastic VGA duct that helps blow cool air over your video card or cards. The duct even has an aluminum plate on it that says Cooler Master. This entire case is set up with one goal in mind, to keep your rig cool. To this end the power supply is under the mainboard to give room for the hot air to rise to the top of the case and be exhausted by the standard dual 120mm fans in the top of the case and the single 120mm fan in the rear.

The six hard drive trays are enclosed all around by metal to help keep the heat they generate away from your components. An optional 120mm fan racket is available to help cool the drives down. All six drive bays are mounted on their sides and require no tools to remove.

The 5.25” optical dive bays use a very unique and easy retention mechanism that needs no tools. You simply slide the drives into the bay and press the blue button to lock them in place. One of the external 5.25” drive bays can hold 3.5” floppy drive as well.

On the rear of the Cooler Master COSMOS are seven expansion slot covers situated right above the PSU bay. If you are into liquid cooling, the Cooler Master COSMOS has two grommeted pass through holes that will fit up to ¾” tubing.

On the front of the case is a reset button, power button, four USB ports, one FireWire port and a first for me, an eSATA port. The mainboard shelf is not removable and is designed to hold both ATX and eATX sized boards. Right in front of the bottom HDD cage closest to the front of the chassis sits a tool kit in a custom Cooler Master silver aluminum case. In side the tool kit are a bunch of wire ties, a small keychain size Philips and flat tip screw driver, and a bag containing the standoffs and screws you need to install your components inside the COSMOS.

Building the System
I have to say that the Cooler Master COSMOS has the best build quality I have seen. I noticed no burrs on my review sample that could cut hands during the build. All the corners and edges are rounded and there is ample room inside the case for even the biggest SLI based computers.

The hard drive cages are well positioned for easy access and quiet, cool operation. You can even change the side of the front panel door the hinge is on if you so desire. Like the Stacker line of cases, the Cooler Master COSMOS has mesh front drive bay inserts to allow cooling air in and hot air out of the inside of the case.