IBM Labs is taking water cooling to another level, literally. While cooling the surface of CPU using water has been around for a while now, researchers at IBM's Zurich lab today demonstrated three-dimensional chip stacks that are We're still a long way off from three-dimensional processors but IBM’s prototyped water-cooling solution seems like a big step in the right direction. The company hopes to commercialize such stacks for its multi-core servers in about five to ten years.