The Antec NSK4480 is a mini-tower computer case designed to fit both standard ATX and micro-ATX motherboards. It is the successor the the Antec NSK4400, with the most significant change being the inclusion of a 380 Watt EarthWatts power supply that meets the 80 PLUS certification, meaning that is at least 80% efficient at 20%, 50% and 100% rated loaded. It features a single tri-speed 120 mm rear-facing case fan, and an opening for an optional 80 mm case fan on the side that is mounted directly above where the CPU would be seated. There is an air guide plastic duct in this opening to help with flow of air to the CPU. It retails for around $100, with the smaller version Antec NSK3480 retaling for about the same.