or in other words, it require taking the whole imac apart, and voids any warranty it may have left. and if it is not put back together just right, it will fry the cpu becasue the fame is part of the heat sink, and needs to have thermo paste applyed to just the right spots durning assembley, or it will not work, and the cpu will overheat, thus making it a very expensive, but pretty, paper weight. i do not recommend doing this to anyone.