So I have the FirePower ModXStream Pro 600W 80Plus, power supply. and I opened up the case it has one PCIE 8 pin power connector I'm looking to upgrade my system and keep it to save about $40 or so on a new system. Question is http://www.amazon.com/MSI-GTX-960-GAMING-4G/dp/B00V4HY522/ref=sr_1_5?s=pc&ie=UTF8&qid=1452188129&sr=1-5&keywords=gtx+960 this has the correct power need as long as I don't overclock the card correct? Also do motherboards all require the same power cables or are some different?