Amazon.com: StarTech.com PCI Express 6 pin to 8 pin Power Adapter Cable - Power cable - 6 pin PCIe power (F) to 8 pin PCIe power (M) - 6.1 in - yellow - PCIEX68ADAP,Black, Yellow : Electronics
Amazon.com: COMeap (2-Pack) 6 Pin Male to 8 Pin (6+2) PCI Express Power Adapter Cable for CoolerMaster and Thermaltake Power Supply with 6 Pin Port 20-inch (51cm) : Electronics
Seasonic Prime Platinum PSU 6-Pin to 6-Pin PCIE Modular Cable (60cm) - MODDIY