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
1.25mm Pitch 8-pin Cable Matching Pair - 10 cm long [Molex PicoBlade Compatible] : ID 4976 : $1.25 : Adafruit Industries, Unique & fun DIY electronics and kits
PCIe 6 pin to 8 pin Power Adapter Cable - Computer Power Cables - Internal | Cables | StarTech.com