Just got a GTX 560 TI by Asus, and I just started to hook it up. My last gpu went off of PCIE power, but this one requires an external source. I also have a Cooler master GX 750w, and it has the 6-pin connectors that looks like it would connect to the gpu's power input. From what I see it looks like I can connect 2 6 pin connectors and it would work, but I don't wont to try something regrettable. What should I do?