StarTech.com 6in LP4 to 8 Pin PCI Express Video Card Power Cable Adapter - 8 pin internal power (M) - 4 pin ATX12V (M) - 15.2 cm

Convert a Standard LP4 Power Supply Connector to an 8-pin PCI Express Video Card Power Connector
The LP4PCIEX8ADP 6-inch LP4 to 8-Pin PCI Express Power Adapter converts a standard LP4 power connector on your existing power supply to an 8-pin PCI Express video card power connector, allowing you to install a PCIe graphics card without having to upgrade the computer power supply.

More from the Manufacturer

• Lets you change the endpoint of a plug
• LP4 first end connector type for reliable data transfer and enhanced connectivity and optimal performance
• PCI-E second end connector type for a secure, worry-free operation
• Relaxes you by letting you replace your misplaced and overused power cable