How in the world are you going to fit 5 GPU's in that motherboard? Do your research, the GPU's can only go in the blue PCI-E slots, and there are only 3 of them on that board. Remember spacing too, on my Sabertooth Z77 board with 3 PCI-E slots I can only fit 2 GPU's on it (GTX 670 and 5970 currently) because 2 of the PCI-E slots are too close together, another GPU wouldn't fit in.