StarTech.com Power Adapter Cable PCI Express 6 Pin 8 Pin PCIe Connect a standard 6 pin PCI Express power connection on the Power Supply to 8 pin ATI and NVidia video cards - Office Depot
Premium Sleeved 8 (6+2) Pin PCI-e GPU Power Extension Cable – 45cm (1.5ft) / White / 2 Pack - Micro Connectors, Inc.
6-pin to 8-pin PCI Express Power Converter Cable for GPU Video Card