The Sapphire Radeon HD5850 Toxic Edition is not only an overclocked version of the HD5850 it also contains Sapphires own cooling solution. The Sapphire HD5850 Toxic Edition comes standard with Sapphires patented Vapor-X dual slot heatsink and fan. Vapor-X is vapor chamber technology cooling and was developed by Sapphire in 2007. The Toxic 5850 is also factory overclocked to 765MHz core and 1125MHz (4500MHz effective) memory speeds which are 40MHz (core) and 125MHz (memory) respectively above a stock Radeon HD5850.