The first iteration of copperslug, made about the time when a AMD Athlon XP 3500+ was a thing. HDD were cooled by two massive 15 lb each copperbricks from a electric cabinet. All drilled and then soldered with tiny 10 mm tubing. The rest of the tubing is also water filled, first powerd by a aquarium pump, later with something more purpose build. No Fans.

It ways over 35 kg/77 lb