I want to buy an r9 280x but I'm not sure if my psu will do the job, I have a corsair tx650 so it obviously does 650w, but I've seen in some places that the card needs 750w. I've also read that the card requires a 6 pin and an 8 pin connector, while my psu does come with 6 pin connectors I'm not sure about the 8 pin connectors. It comes with 1 eps connector, will that work as an 8 pin connector?