"The True Black 120 CPU cooler features a solid copper base, six
U-shaped heat pipes and a large aluminum fin array. Although there are
physically just six heat pipes, the U-shape configuration results in six
evaporator sections (where the heat pipes contact the base and absorb heat
from the CPU) and twelve condenser sections (where heat is dissipated into
the aluminum fins). As we will see later, this results in a very efficient
heat transfer arrangement!"
FULL STORY @ PCPER (http://www.pcper.com/article.php?aid=593)