Cooler Master Cosmos II Case Review

The Top Panel

The Cooler Master Cosmos II comes with one 120 mm fan on the rear part of its top panel and space for installing two additional 120 mm fans. See Figure 9. You can also install a 200 mm fan on the top panel by removing the 120 mm fan that goes there, and there will still be space for one 120 mm fan. The top fans are installed to an individual three-speed fan controller located at the front part of the top panel. The top fan rotates at 1,200 rpm and produces a 17 dBA when set at its maximum speed. The case supports the installation of 240 mm or 360 mm radiators of liquid cooling solutions on the top panel. An air filter is available on the top panel.

Figure 8: Top panel

Figure 9: Top panel

On the front part of the top panel, the Cosmos II has a sliding plastic lid that covers the on/off, reset, and fan controller buttons. There are four three-speed fan controllers, labeled “front,” “top,” “HDD,” and “GPU.” The controllers labeled “front,” and “top” are connected to the front and top fans, respectively. The “top” controller can also control the two optional fans that can be installed on the top panel. The “HDD” controller is connected to the two 120 mm fans that cool down the hard drives located in the power supply compartment. This controller has one additional output, for controlling an optional 120 mm fan that can be installed on the side of the upper hard drive cage. Finally, the “GPU” controller is used to control the two optional side fans.

There is no controller designated specifically for the rear fan. Therefore, you can connect it to the “GPU” controller if you don’t have side fans. However, if these fans are installed, you will have to connect this fan to either an empty output of the “top” controller or to the “HDD” controller. Of course, you always have the option for installing it on the motherboard or directly on the power supply, using the adapter that comes with the case.

Each controller beeps every time you press it, and the available LED changes its color depending on the speed set: blue (low), purple (medium) or red (high).

There is also an on/off button for the LEDs of the fans. Only the front fan comes connected to this button, since it is the only fan with LEDs (blue, by the way), but this button can control another eight fans if you decide to install fans with LEDs.

Figure 10: Buttons