24 Pin port connects to ATX Power Supply,18 Pin port connects to HP motherboard;Allowing you to convert standard 24 pin ATX power supply to 18 pin HP motherboard power supply connector;Compatible with HP Z420/Z620 systems having 18 pin power connector in motherboard;Maximum power: 1000 watts; Please note that do not support HP Z210The 24 Pin to 18 Pin ATX power cable is to to convert standard 24 pin ATX power supply to 18 pin HP motherboard power supply. It offers a cost-effective solution for replacing the factory power supplies in HP motherboards.Type: Power Adapter CableName: 24P to 18P ATX PSU Power Adapter CableFit: for HP Z420 Z620 mainboradConnectors: 1 x 24 pin port, 1 x 18 pin portSize:About 30cm in lengthcolour: as shownMaterial: PVC+18AWG tinned copper wiresPackage Contents:2 x 24 Pin to 18 Pin ATX Power Adapter CableOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.