Designed for the enthusiast or demanding user, the SAPPHIRE HD 5850 2G Vapor-X Edition is factory overclocked to 735MHz core and has 2GB of high speed DDR5 memory clocked at 1050MHz (4200MHz effective). SAPPHIRE’s World leading Vapor-X technology not only allows the cards to run as much as 15 degrees C cooler and 10dB quieter than the standard models, it provides additional headroom for further performance tuning (overclocking).