After a quick pressure test with a bicycle pump and changing a fitting that wouldn’t seal well, we filled the water cooling system. The system took around 700 ml of coolant, more than expected, but much of that is probably in the radiator. After fighting with the BIOS on the server motherboard, we got Ubuntu 12.04 installed. The processors idle at around 37° C, and running mprime on 30 threads leads to ~50° C, so the water cooling appears to be working well. These values should get better on the actual robot since airflow through the radiator will be better.