StarTech.com 20 Pin Motherboard to 24 Pin ATX Power Adapter - 6-Inch (ATX2024FM)
This 20 to 24-pin Power Supply Adapter features a 20-pin Female ATX connector as well as a 24-pin Male ATX connector, providing a cost-effective way to connect a 20-pin compatible motherboard to a power supply with a 24-pin connector, allowing the use of a newer 24-Pin Power Supply with an older 20-Pin Motherboard