Product Detail 24-pin female end connects to EATX power supply 20-pin male end connects to ATX motherboard Keyed cables are easy to connect correctly Maintains compatibility for newer power supplies & older motherboards Length: 20cm / 8in . The "20-Pin Male to 24-Pin Female ATX Power Supply Adapter Cable" is best product for you. We recommended 20-Pin Male to 24-Pin Female ATX Power Supply Adapter Cable