Liquid cooling is a familiar concept to PC enthusiasts, and has a long history in enterprise compute as well. Recently, liquid cooling has taken an increasing role in datacenters, amid increasing power draw and correspondingly high heat output from the latest chips. Machine learning in particular has an insatiable appetite for power and cooling. Google notes that water has a thermal conductivity about 4000 times that of air, making it an attractive solution to deal with the cooling demands assoc...