Sapphire VAPOR-X HD 4890 OC Edition 1GB GDDR5

Sapphire was the first company to release a so-called Vapor Chamber Technology which is specially designed for graphic cards. Using this technology, you can get a better heat dissipation or cooling of the graphics card. And on the same hand a better overclocking becomes possible. This technology was previously used in the aviation and space industry and in high-end server applications, and will lead to more efficient and compact cooling. This technology works much like the heat pipe principle. A liquid refrigerant evaporates in the heat and condenses back after striking a cool surface. Subsequently, the cooled fluid is passed on to the hot surface. This creates a cycle. With the Vapor-X technology is all done in a very thin, about 3 mm high vapor chamber (for the single-slot design). The principle works but with a much lower temperature than the boiling point because it was created in a vacuum chamber.