I apologise if this has been asked somewhere on here before but i have looked and cant find anything. I have a R9 280x in my 5,1 at the moment, flashed with boot screens works perfectly. It runs GTA V in bootcamp at 1080p fine at 60fps, but if i wanted a bit more horsepower is it possible to add another identical card (flashed etc) into the MP? A company called CreatePro who build custom 5,1's with pretty much anything they can support inside say they can build you one with dual 280x's so im thinking it obviously can be done. But how would i power it? As the one card takes up both ports from the logic board, HDD/Optical bays using sata to PCIe adaptors? Would there be a danger of trying to draw too much power from the PSU? I really have no idea when it comes to power requirments etc. Thanks in advance.