This is what I came here to ask. Seems a bit silly to fill the whole tower case with cooling fluid. My guess is that the incremental benefit you get from the

This is what I came here to ask. Seems a bit silly to fill the whole tower case with cooling fluid. My guess is that the incremental benefit you get from the redesign doesn't outweigh the costs. It may at very large scale, and I would guess that Amazon, Facebook and Google have all experimented with it.