so i was thinking of getting the kfa2 gtx 1070 as its the cheapest and people say its fine. theres no problem with that. i am just confused because it has an 8pin power slot and also a 6 pin in total 14 pins. are they made so that you can run the 1070 of only 6 or 8 or do i need to use 14 pins to even run it at all