The Dell Optiplex Genuine Original 305W Power Supply NPS-305KB A N305P-06 C248C MT is a reliable and high-quality power supply module designed for Dell Optiplex computers. With a maximum output power of 305W and compatibility with 115V and 120V voltages, this power supply is suitable for various Dell Optiplex models like Dimension E310, E510, E520, and E521. The sleek silver color and ATX form factor make it a stylish and functional choice for powering your computer system. Built with a single fan for cooling, this power supply is a genuine Dell product that ensures compatibility and efficiency. With power cord ! Untested