Hello I am thinking of doing a 2-way SLI setup for my EVGA GTX 770 SC ACX. Right now i just have the included fans from my fractal R4 (one 140mm in the front, another in the back), and an coolermaster GPU fan. Here is my build: http://pcpartpicker.com/p/3kPJh. I'm not sure if i need more fans or if the ACX fans on the GPU are good enough to keep both cool. And if i do need more fans, where should i put them? Thanks in advance. Loving the Tom's Hardware forums so far.