The Dell 0D3D1C L265EM-00 265W 80 Plus Gold Optiplex 790/990 ATX Power Supply (PSU) is a high-quality power module designed for universal compatibility with various brands and models, including the Optiplex 790, Optiplex 990, and any ATX computer. With a maximum power output of 265W and a cooling system featuring a single fan, this silver-colored power supply unit is reliable and efficient for powering your computer system. It comes with multiple connectors including 4 pin 12V, 24 pin, and SATA, making it easy to set up and use with your existing computer components.