DESC: The NSK6580 combines ease-of-use features like a removable 3.5” HDD cage that holds 5 removable trays with Quiet Computing™ technology and a 80 PLUS® Certified EarthWatts 430 Watt power supply with universal input and active PFC. Indirect front bezel vents and silicone grommets for the hard drives minimize noise while the crisp, understated styling makes the NSK6580 an attractive addition to your office.