StarTech PCI Express 6 pin to 8 Pin Power Adapter The PCIEX68ADAP PCI Express 6 pin to 8 pin power adapter cable lets you connect a standard 6-pin PCI Express power connection provided by the computer power supply to ATI and NVidia video cards that require an 8 pin power connection. A cost-effective solution, the PCIe 6 pin to 8 pin power adapter eliminates the expense of upgrading a computer power supply for the sake of compatibility with a newer video card.