I just purchased the PNY - NVIDIA GeForce GTX 1070 8GB GDDR5 PCI Express 3.0 Graphics Card - Black from Best Buy and I seem to have lost the power connector that came with my PSU to connect it to the GPU. It requires a single 8 pin power and it included an 8 pin to two 6 pins. My PSU includes a slot for an 8 pin and a 6 pin. What cable do I need to get to connect my PSU to my GPU.