[CheeseBall]

Umm... yes, that is what I said. I am talking about -30C phase change cooling here. So once the water is frozen, it's going to stay frozen unless your compressor stops or something. The thing is getting a good joint between the two. If I did the same method from above, once we powered on the phasechange system, the liquid water would freeze and expand w/ no place to go. So we need a different method of holding the water there. I dunno if you put a couple drops of water on the CPU die, then mounted the block, then turned on the phase change system if that would work. I thinking that method would not be reliable enough. If it's at all possible, we would want the ice totaly frozen to the die and block as good as possible. Like when there is a puddle on some concrete, you throw a peice of plywood on it, and then the puddle freezes and you have to pry on the plywood like crazy to get it off. Again, ice might conduct heat like crap, I dunno.