StarTech.com 6in 20 Pin Motherboard to 24 Pin ATX Power Adapter - M/F (ATX2024FM)
The ATX2024FM 20 to 24-pin power supply adapter provides a cost-effective way to connect a 20-pin compatible motherboard to a power supply with a 24-pin connector. The adapter lets you use a newer 24-pin power supply with an older 20-pin motherboard.