Connect a standard 6 pin pci express power connection on the power supply to 8 pin ati and nvidia video cards 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 compatibili