@pearshapes could you elaborate on what exactly you did and what connector you used? We might be able to help you figure out whether you need to send the card back or not.
@Rosemary EPS 8 pin connected to a 4 pin atx out
@Rosemary i plugged it in and turned on the power, tried to start it twice, unplugged about 10-15 sec after initially turning on the power
@pearshapes Does your power supply not have an 8-pin PCIe power connector?