That's one of the problems that 3D stacking present: http://eandt.theiet.org/magazine/2015/02/3d-chips.cfm http://eandt.theiet.org/magazine/2015/02/3d-chips.cfm

That's one of the problems that 3D stacking present: http://eandt.theiet.org/magazine/2015/02/3d-chips.cfm http://eandt.theiet.org/magazine/2015/02/3d-chips.cfm I would also bet on a combination of specialized hardware for certain software, something along the lines of Bitcoin miners ASICs.