There are three considerations whether the two chips can be used in general: first, whether the calorific value (power) of the two chips is the same; Second, whether the contact surface with the heat sink is the same; Third, whether it can be fixed tightly or not, poor contact will affect the heat dissipation efficiency. Finally, whether the fan rings has nothing to do with the chip, but the fan itself, such as coaxiality, dynamic balance, bearing quality, clearance and so on. And whether the coil vibrates.