I have two pci plugs running from the gpu plugs to two different pci slots in my power supply. Is this the right hookup method for this graphics card since it requires a supplemental power supply. The only reason I ask is because the modular cables that came with my corsair RM750 psu have pci splitters/breakaways, so it looks like I could plug the same cord into the gpu twice or two different gpus on the same power cord. Thanks!