This is ATX P4 4-pin 12V Power Connector to Molex Cable Adapter

Description

• You can use a P3 4pin Power Supply for your P4 Motherboard or a P4 power supply for P3 board with this cable.
• Pentium 4 motherboard requires the use of the new ATX 12 Volt power supply.
• The ATX12V power supply has an extra 2x2 4pin cable.
• Now you can use this adapter cable to make your existing standard ATX power supply work with a Pentium 4 motherboard.