PC power supply CPU EPS 8 pin to 2 PCI-e 8 (6+2) pin
Amazon.com: zdyCGTime 15-Pin SATA Male to 8 Pin (6+2 Pin) PCI-Express Female Video Card Power Adapter Cable(20CM/8inch) : Electronics
8 Inch PCI Express 6-pin Female to 8-pin Male Power Adapter Cable For Video Card | eBay
Amazon.com: DZS Elec 2pcs Dual Molex 4-Pin Male to 8-Pin Male PCI Express Power Converter Cable for Video Card Pci-e ATX PSU Power Supply - 2X Molex to PCIe Adapter 20cm :
1pcs 4-Pin to 8-Pin 12V ATX Motherboard CPU Power Supply Adapter Converter Cable | eBay
2 x 4-Pin Power Connector to 8-Pin Motherboard Connector Adapter - modDIY.com