Cable Adapter 20 Pin ATX male power supply connector to Mini HP 24 Pin ATX female power connector for select HP computers, 4 1/8" long from connector to connector. Use this cable adapter so you can use a regular ATX or Micro ATX power supply with 20-pin power connector in a HP computer where its motherboard only takes the HP mini 24-pin power connector Easy hook up, just plug this cable adapter on to any 20-pin or 24-pin power connector on a regular ATX or Micro ATX power supply. Save you money so you don't have to buy a expensive HP original replacement power supply when the old factory power supply stops working. Even better when you want to upgrade the original factory power supply to something more powerful in ATX or Micro ATX form factor.