The D400EPS-00 400W Power Supply is designed to fit the Dell OptiPlex 3000, 3900, MT 5000, and 7000 series machines. It comes with a 1-year warranty and is compatible with the specified models. With a minimum input voltage of 100 volts and a maximum power output of 400 watts, this EPS power supply is essential for ensuring reliable and efficient power delivery to your computer system. This compact and reliable component measures 6 x 4 x 2 inches and includes the necessary ATX SYS and GFX1 connectors for seamless integration into your setup.