does anybody use dual atx power supplies with this board? I believe with a regular riser build you want to avoid having a gpu powered by one psu and its riser powered by another. It looks as though this would be  unavoidable with is board, 1 psu would power the board(and its pcie slots) and some gpus while the 2nd psu would be powering the rest of the gpus that were connected to the 1st psus powered pcie slots. would this not be an issue on this board or am I over thinking this?

the rig I would be transferring over uses 2 evga 850 G2's, 4 pcie each that I use for cards now and molex for my risers in current build... would I be able to use molex to 6pin adapters to power the board?