The D250AD-00 L250NS-00 Power Supply 250W is a reliable and efficient power supply designed specifically for DELL Optiplex 390, 790, 3010, 530s, and 537s models. With a maximum power output of 250 watts and a cooling system with one fan, this power supply ensures stable and consistent performance for your computer system. Compatible with various DELL models, this power supply is a dependable choice for keeping your computer up and running smoothly.