Hello, I recently got an old asus r9270x 2g, and am installing it only my computer. The issue I'm having is that my 650w evga power supply has 1 pci e rail with 2, 6 pin heads that have 2 small pins with them. The gpu has 2, 6 pin connectors on it. Should I use one rail and attach both heads on the gpu or is this incompatible.