Hello, this is another one of my Dell XPS questions, I was wandering what kind of power supply would work with the Dell XPS 8700. Since I am going to buy a Nvidia GTX 970 GPU, I will need a bigger power supply. The only thing I fear is that I might purchase a PSU with an incompatible connectour to the motherboard. Does anyone know a good PSU to use? Preferably an 850 Watt?