i am installing my sapphire r9 290 tri-x oc and the pci-e from my psu (cm v850) have 2 six+ two pin connectors coming from the same plug from the psu (cable plugs in to psu and splits to have 2 six+ two pin connecters for the graphics card. I am wondering if is fine to use the single cable and both connectors or should i use 2 cables and i plug one connector from each. Thx (i am a computer building virgin and have never done this before).