Hello I have a 2010 Mac Pro. Currently I'm using Mac Edition EVGA GTX680 with 2 6-pin connectors. I mostly use Windows on it due to the programs I use. Now, I'm planning to purchase either GTX970 or GTX1070. I saw GTX1070 Founders Edition by Nvidia, but it looked like it only had 1 8-pin connector. Since I use my GPU heavily (game, video editing, etc), I am trying to find a card that won't turn off during my usage. Are there any 9 series and 10 series cards that won't have any issues in Windows with 2 6-pin connectors? Or, do I have to use 1 8-pin connector cards? If you can give me some product names/links, that'll be fabulous. Thanks.