When it comes to size alone, Silencio 550 is much like the CM Enforcer we’ve tested recently, here. However, the Silencio 550 looks nothing like its sibling, as is evident from the pictures. The Enforcer is obviously made for gamers, while Silencio, with its mirror finish on the front, is more appropriate for users who like classic designs.
Silencio 550 weighs in at 9.2kg, which is 0.3kg more than the Enforcer. Silencio 550 measures (W) 210 x (H) 415.5 x (D) 505.2 mm.
Silencio 550 is completely painted black, both inside and outside. There are no windows or air outlets on the side panels or top panel. As you can see, there aren’t many openings that would allow sound to travel outside the case.
The front mirror-finish panel is actually a plastic door and the company is quick to add that the panel reflects the calm and quiet of Silencio 550. The door is opened to the left and the direction cannot be changed.
You can take the front panel’s protective plastic cover off, but since wiping fingerprints off of the mirror finish is not an easy task, it might be best if you left it until you’ve put all the components in.
The front panel will take two fans but it comes stocked with one 120mm (800RPM). Cooler Master left holes on the edges of the front panel in order for air to reach the fans.
There are about two centimeters between the front panel foam and the fan, which act as chamber for supplying air. This easily removable part comes with dust filters.
Silencio 550 is not all looks however. The front panel has a hot-swap interface for instant hard drive connections, which Cooler Master dubbed the external SATA X-dock. Above it are two 5.25″ bays.
Reset, On/Off keys and connectors are located on top of the case. Thankfully, Cooler Master made sure that the case has USB 3.0. 
Silencio 550 has seven expansion slots and two holes for water cooling.
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