Techware Labs has just posted a review of Horse of Iron's PolarFlow milled water block and fan adapters.
Milling from a solid piece of metal is worth mentioning because the alternative is a block or adapter made from a mold and molten metal. Such a product is inferior due the the possibility of bubbles in the metal. Additionally, molded pieces crack more easily when portions of the metal that were poured cool faster than others. Milling is a more expensive, time consuming process, however, the end result is a product that will stand up to time and stress.Read more