Here is a necessity on any case with a bottom mounted PSU; Corsair included a nice fine mesh PSU vent to keep the most amount of dust out of your PSU. This is also removable and easily washable.
One of Corsair’s more stylish features of this case is the top mounted SATA dock.
The 650D has a feature other Obsidian Series cases did not have, and that’s the top mounted SATA dock. This dock is also VERY user friendly allowing you to easily slide in a 2.5″ SSD (solid state drive) or hard drive without having to worry about guiding it, or being a snug fit for a full 3.5″ drive if needed. The little arm you see in the picture is spring loaded and folds down if you put in a 3.5″ HDD/SSD. The small little switch to the bottom right is the fan controller. It raises from 40% to 100% fan speed, and easily gives you simple control over the fan itself while keeping the cases a uniform look.
One of the best design options of the Corsair 650D is the hidden front panel and its number of connections. With a simple push the door flips down and we get access to two USB 3.0 ports, two USB 2.0 ports, Firewire/IE1394 400, and 3.5mm headphone & microphone jacks.
A new addition to this case vs. the older 600T based on a similar design is a set of grommets to isolate fan vibrations; this helps reduce the overall case noise as well.