Go big or go home. That’s a lesson Corsair apparently took to heart for its first chassis, a 24x24x9-inch full-size enclosure that rivals Cooler Master’s ATCS 840 in size. Corsair’s Obsidian 800D is all black, from its matte steel frame and side panels to its brushed-aluminum front bezel, from motherboard tray to front-panel cables, from screws to standoffs. And the goodness is more than skin deep—the 800D has everything you’d expect from a premium case: quick-swap SATA bays, thermally isolated compartments, plenty of cable-routing cutouts, and more. In fact, it’s one of the best cases we’ve tested in years.The 800D is divided into several “cooling zones”: the top compartment with the motherboard and optical bays; the bottom compartment, where the power supply sits; and a front compartment with four hot-swap 3.5-inch SATA bays. Each compartment is cooled by a separate 14cm fan, and the top compartment has room for three additional 12cm exhaust fans, as well as support for liquid-cooling radiators. Fresh air is drawn in through dust-filtered intakes at the bottom of the case, which is lifted one inch off the ground by three supporting feet.