Pentium 4 motherboard requires the use of the new ATX12V 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.
This product is constructed using high
quality 18 AWG UL/CSA certified cables and UL/CSA certified connectors
used. maximum current capacity is 18.8 amp.