Answer to: Replace hdd with ssd - questions I still can't find answer to(1) Choosen SSD will work. (2) Performance of the OCZ? Forget the different benchmarks. It's more a valuable thing. (3) Fan-issue? I gather the sensor is bonded like on to the older iMacs. Strip it carefully off and re-bond it to the SSD. (4) Warranty will lose, if change of HDD is not done by certified Apple partner.