While most of the mainstream computer users wont go beyond a normal Heatsink, there are a few who will venture into the realm of watercooling, and beyond that theres the chosen few who are really extreme.
This PC is fully immersed in fluid, but its not water, a non-electrically conductive fluid must be used. This is the ultimate in complete PC cooling.
Take your favorite translator along as this one is not in english, but pictures are universal.
Fluid Submersion