The HIS Radeon HD 4890 iCooler x4 is not simply just another Radeon HD 4890 graphics card. Furthermore it is not just another Radeon HD 4890 with an improved cooler. Rather the Radeon HD 4890 iCooler x4 is a re-engineered version of the Radeon HD 4890 featuring an improved power plant, and this is what helped to make our overclocking ventures so successful.



Link: Legion Hardwware