A closer look
Now that we've given you the Cliff's Notes about the Obsidian Series 350D, let's go in for a closer look—and pop off those side panels while we're at it.
The 350D is made of steel, but its front panel is fashioned out of brushed aluminum. At the top lie the two 5.25" bays, pairs of USB 3.0 and audio ports, and the power and reset buttons. The power button is the big flat one in the middle; the reset button is tiny, recessed, and lumped next to the audio ports. There's little danger of hitting it accidentally, unless you try hooking up a mic without looking at what you're doing.
The bottom half of the front panel is detachable and conceals the intake fan filter. To detach the panel, simply push the top two corners inward. The spots you're meant to push are each marked with five little white dots.
Under the panel lurks the fan filter, which is also detachable. Removing it involves pulling on a tab at the top. And behind that sits the 140-mm intake fan, which ships with the case by default. If you need extra airflow, the 350D has room for a second 140-mm intake. You'll have to unscrew the stock fan and move it a couple inches (either up or down) to make room for the extra spinner, though.
Pop off the windowed panel, and you're greeted by a familiar-looking interior. At least, it ought to look familiar if you've ever used a Corsair case before. All the usual ingredients are present: tool-less 5.25" bays, dedicated SSD bays, removable 3.5" trays, rubber-lined cable routing holes, and a big cut-out behind the CPU socket area. The cut-out is there, of course, to allow the installation and removal of heatsinks while the system is assembled.
From this angle, we have a better look at the internal cooling features. The case ships with a 120-mm exhaust fan at the back. There's also room for dual 140-mm fans—or a 280-mm radiator—at the top, and Corsair includes a removable dust filter underneath the power-supply emplacement.
Most PSUs these days have big, bottom-mounted intake fans. In enclosures like the 350D, where the PSU compartment is at the bottom, the power supply will be sucking air directly through the bottom of the case. A removable filter can help keep the unit dust-free.