Coolermaster has always been fan of tool-less designs, the Cosmos is no different, the side panels are removed without the use of any screws, just pull the lever at the rear upwards and the side panel tips open allowing you to take it away and access the internals.
The side panel is multi layered, designed to prevent noise from escaping the case, the side panels are padded with noise absorbing materials. A small rubber ring on the case around the edge of the side panel hole prevents vibration noise when the panel is installed.
Without the side panel you can see most of the Cosmos’ features, the six removable HDD bays, the tool-less 5.25” drive mounting system, the VGA air duct, the bottom 120mm in-take.
The other side is less spectacular, but does show you more clearly the holes for cable hiding and guiding, and at the left bottom you can see the bubble wrapped tool kit.
Inside the case you’ll find a manual, an useful 8-PIN EATX cable extender, cable guiders and a separate aluminum box which holds screws, cable ties and a key-ring screw driver set. Cooling
Coolermaster has taken an alternative approach for cooling with the Cosmos, by lifting the case up they can place in-take at the bottom of the case, thereby reducing noise compared to having an in-take fan at the front panel. There are two dust grills installed at the bottom which can be easily slid out and cleaned. One at the rear over the PSU area, one at the front under the HDD bay area.
In the photo above you can also see the standard 2x120mm fans installed at top, together with the rear 120mm fan they make for an unbalanced in/outtake equation: 3 exhaust fans, 1 in-take fan. Thus causing lower air pressure inside the case, and air will be pulled through those holes available; since the side panels are tightly closed, and the front door blocks of most of the front grill area, the main air draw will be from below the HDD bays, thus cooling the HDDs without active fan installed.
In the photo above, under the 120mm fan you can see the PCI brackets and the thumbscrews holding them in place. All four 120mm fans are powered by 4-pin power connectors, if you plan on using a fan controller, make sure it supports 4-pins.
The bottom fan sits in its own bracket with tilted grill to allow air to be directed diagonally, in this case, the bottom in-take will blow cool air towards the VGA card(s).
Coolermaster did not include any active cooling for the HDD bay, however you can relocate the bottom fan bracket to the 5.25” bay (taking up 2 spots) and provide cooling there. Optionally you can order a second bracket to occupy cooling spots at the bottom and for the HDD bay.
The power supply takes fresh air from outside the case directly, the unit rests on harder foam to prevent vibration noise:
With the cooling and most of the inside features covered, it’s time to install some hardware ->