"Now even though the Waterchill kit is fairly new to the market, it wasnÂ’t just thrown together overnight. Weeks of machining, simulation and testing went into creating the final design weÂ’re looking at today. Two initial CPU block designs were run through the gauntlet, the half moon design and the spiral or maze configuration. With a higher heat distribution efficiency as well as a higher flow rate, the half moon design outperformed its counterpart and went on to be tested against the leading competitors. "

Gruntville.com

"The universal CPU block is made up of a copper base and a thick acrylic lid. The base of the block is well finished, and lapping the heatsink was not necessary for us (we tested for this, which we will explain during the installation portion of the review). The rubber gaskets provide a firm seal, and are reusable anytime you need to take it apart. The standard acrylic lid has ten holes in it, providing compatibility across current Pentium 4 478, Athlon 462, and Athlon 64 CPUs."

Viperlair.com