The full tower case is constructed out of steel and plastic and has room for an E-ATX, XL-ATX, ATX, micro-ATX or mini-ITX motherboard. Up to four 5.25-inch and six 2.5/3.5-inch devices can be installed into the chassis. NZXT has integrated LEDs, an SDHC card reader and a fan controller, which supports up to four channels with 15 watts each. The top of the case also has the familiar audio jacks, in addition to 2x USB 3.0 and four USB 2.0 connectors.
The NZXT Phantom 820 has three 200 mm fans, which spin at 800 RPM. Also present is an 1100 RPM 140 mm fan. Optionally, an additional 200 mm fan can be placed on the top, and two more 140 mm fans on the bottom of the case. Graphics cards with a length of up to 333 millimetres can be installed.
The NZXT Phantom 820 has a recommended price of €250 (£205).