I have a 460 watt power supply in my computer and currently a gtx 645 that came stock with my pc. I want to upgrade to a gtx 1060 3gb but want to know if 460 Watts is enough, I have a six pin connector. My pc is a xps 8700, i7 4770k @ 3.40, 12gb of ram, and 1tb seagate hard drive.