Looking to upgrade your Dell Precision 380, 390 or T3400 power supply? Use this power supply to replace your original. Featuring a reduced depth, this power supply has universal compatibility to replace ATX power supply form factors. Wattage: 400 Watts Type: ATX Connectors: ATX (20+4) Pin X 1, P4 12V 4-Pin X 1, SATA 15-Pin X 3, LP4 4-Pin X 2, Floppy 4-Pin X 1 Dimensions: 5.9"(W) x 3.4"(H) Frequency: 60 / 50 Hz Input Voltage: 110 / 260 Volts AC Output Voltage: +3.3V 11A, +5V 12A, +12V 8A, +12V2 8A, -12V 0.3A, +5VSB 2A Temperature Range: Operating: 0 C - +50 C on Full Load.