Sapphire Radeon Vapor-X HD 4890 1GB PCI-E model is a new SAPPHIRE original design. It has Sapphire’s Vapor-X cooling module on the GPU together with a heatsink and profiled fan venting heat out of the case. It is quieter and significantly faster than the standard reference model, with core clock speed of 870MHz and 1GB of DDR5 memory clocked at 1[Read More]