Amazon.com: AYA 24-pin ATX to Dell 24+16-pin Convert Adapter Cable AYA-24M2416F-ATX : Electronics
Amazon.com: 9 Inch ATX Power Supply 20 Pin / 24 Pin to Small Mini 24 Pin Connector Adapter Cable Cord for HP Slimline Flex ATX MotherBorad Main Board (Does NOT Work with Dell System) : Electronics
Athena Power CABLE-DELL-P16 ATX 24PIN to Dell 24pin / Dell ATX 16PIN