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
EnLabs ADPCIE6P28P10CM 4 inch PCIe 6pin to 8pin Adapter, PCI-e 6-pin Male to 8-pin Female Converter for PCI Express 8pin powered GPU Video Card - Newegg.com
StarTech.com PCI Express 6 pin to 8 pin Power Adapter Cable - PCIEX68ADAP - -