I have the Evga Supernova 1000G FTW ATX 3.0. I also have a Asrock 7900xtx Taichi OC and it requires 3 8pin power cables. My question is this Psu came with 2 8pin-6+2 and 2 8pin - Duel 6+2 , can I use one of the 8pin duel 6+2 cables and leave one of the 6+2 tied up?