REPLACES PART NUMBER NSK6580. Quiet and highly efficient 80 PLUS Bronze Certified EarthWatts 430D Watt power supply - Universal input - Active PFC and high-efficiency design for superior environmentally-friendly operation - 80PLUS Bronze Certification means you\'ll save money on your power bills Advanced cooling system: - 1 Rear 120mm TriCool 3-speed fan - 2 Front mounts for optional 92mm fans - 1 Advanced Chassis Air Guide with mount for optional 80mm fan - VGA vent. 9 Drive Bays - Front Accessible: 4 x 5.25 (with one 5.25 to 3.5 adapter) - Internal: 5 x 3.5 removable HDD trays with silicone grommets in a removable HDD cage to isolate drive vibrations 7 Expansion Slots Front-mounted ports for easy multimedia connections - 2 x USB 2.0 - 1 x IEEE 1394 (FireWire i.Link ) - Audio In and Out 0.8mm cold-rolled steel construction Motherboard: Fits micro and standard ATX