This is a replacement PSU for your HP, Ac Bel, and Bestec power supplies. Replaces part numbers 504966-001, TFX0220D5WA, and TFX0250D5W. High Quality 420 Watt replacement. 420W TFX Power Supply Upgrade Replacement for HP 504966-001, Bestec TFX0220D5WA, TFX0250D5W, AcBel PC8046, DELTA DPS-250AB-28 B, HP Slimline S5000, s5213w, NY646AA, NY469AA, s5120y, KY818AA, s5220f, NY542AA, s5212y, VT493AA, Compaq Presario CQ4010F, NY650AA PCI-Express SATA. 1 x 20+4 pin Main Connector; 1 x 4-pin P4 CPU Power Connector; 2 x SATA; 2 x 4-Pin Molex. Additional connectors for increased compatibility.