Hi guys, I'm installing a new PSU for my Geforce GTX760-DC2OC-2GD5 Graphics Card. I got a Corsair 650 TX for it. I'm a little confused when trying to connect the cables to the card. It came with an adapter that has two six pins on one side, and an 8 pin on the other side that goes into the card. The question is, do I need to use both six pins that go into a single 8 pin or just one?