This adapter converts your ordinary 24 pin atx connector to the proprietary 24 pin + 16 pin proprietary connectors. If you'll notice the Dell 24 pin proprietary connector is missing two pins and has different voltages on some pins than the ordinary 24 atx connector. The Dell proprietary 16 pin connector is populated with 9 pins in different spots. The purpose of this adapter is to allow you to use an ordinary atx power supply to power Dell systems with the proprietary 24 and 16 pin connectors. This adapter will work for the Dell computers listed below. If you get our 20 to 24 pin atx converter you can use an ordinary atx power supply with a 20 pin atx connector in the Dell systems listed.