400W Power Supply Upgrade for Dell L250NS-00 D250ED-00 H250AD-00 AC250NS-00 Guaranteed tofit your model Slimline Computer List below 1 x Main connector (20+4Pin) This works with both 20 pin and 24 pin main connectors! 1 x 12V P4 connector, 2 x 4-pin Molex Connector, 2 x SATA (Serial ATA) connector 400 Watts - This is an upgrade with additional wattage for additional devices, this replaces lower wattage power supplies