Cable Matters 2 Pack 6 Pin to 8 Pin PCIe Adapter Power Cable - 10cm: Amazon.de: Computer & Accessories
Amazon.com: 8" PCI Express 6-Pin to Dual 4-Pin Molex Male ATX Power Cable, Manhattan 378314 : Electronics
Amazon.com: StarTech.com 6in LP4 to 6 Pin PCI Express Video Card Power Cable Adapter - Power adapter - 4 pin internal power (M) to 6 pin PCIe power (M) - 6 in - LP4PCIEXADAP : Electronics