The Dell OptiPlex Genuine Original 305W Power Supply L305P-01 PS-6311-5DF-LF NH493 is a high-quality power supply for Dell computers. With a wattage of 305W and compatibility with various Dell models, such as Dell Dimension E310, E510, E520, E521, OptiPlex 320, 330, 740, 745, 755, PowerEdge T100, T105, this power supply is reliable and efficient. It features a standard size, silver color, and ATX form factor, making it a suitable choice for computer systems. With its genuine Dell brand and 24-pin connectors, this power supply ensures compatibility and performance for your computer setup.