Hello, I am posting this to hopefully get the right PSU for my build. I currently have a 780 lighting and powering it is an older XION 1000P14LE. I am not sure but I believe the +12 volt rail is only 20A. Which is probably not enough amperage. I was think of purchasing this one, http://www.microcenter.com/product/383022/SMART_Series_850_Watt_ATX_Modular_Power_Supply. Will this be capable of running this GPU and another one in the near future. I know the power consumption at 100% for my processor is 150 watts and the video card is at 300 watts.