A look at the rear of the Cosmos II hints at just how large this case is; 10 expansion slots, a 140mm exhaust fan, water cooling provisions that allow three tubes to pass through and a bottom-mounted power supply. The PSU bracket is removable for easier installation while the top grill can also be taken off to install a radiator or cooling fans. Also note that the PSU mounting area has been extended to allow for extra-long units. There's a removable air filter just under the PSU to allow for easy cleaning. Cooler Master utilizes the same handles from the top of the case to serve as feet to raise the chassis off the ground.
One of the coolest things about this case is how the side panels operate. Rather than simply unscrewing and lifting off like you'd find with most full tower systems, Cooler Master has implemented a neat hinge system that allows the door to open up backwards (think suicide doors on a car). While the feature is very convenient, I do wish that the doors hinged at the back and opened the other way. Having the door open towards you when the system in on a table is rather strange. But hey, it works and furthermore, the panels can be lifted up and off for 100% access.
Inside we see a work of art, perhaps only rivaled by Corsair's 800D in terms of size and thoughtful layout. The front panel cables and fan connectors somewhat clutter things up but that's just for now and will be rectified later during hardware installation.
Starting at the bottom we have a bracket with two 120mm fans used to cool the six hard drive bays at the bottom of the case. This fan bracket is removable for hard drive installation or you can leave it out completely if you don't plan to have any drives installed there. The drive doors pop out and allow you to slide each tray out for easy installation.
Continue on for more of the interior...