The bottom 120mm exhaust fan

A dampening gasket is installed for the power supply holder.

The two 120mm exhaust on top. If you have realized by now, Coolermaster employs stamped grilles in the Cosmos, something that enthusiasts might dislike as it really impedes airflow.

The 120mm rear exhaust fan

PCI slot holders are  held by thumbscrews, which adds to the tooless capabilities of the case.