fan rpm means
2. RPM can also refer to the revolutions per minute a computer case fan or heat sink fan spins. With a high RPM, the fan will move more air or remove more heat from the computer or processor.However, keep in mind that as you increase the RPM of a fan the noise or decibel (dBa) also increases.1  A computers fan RPM can be measured using software tools such as HWMonitor.ith a high RPM, the fan will move more air or remove more heat from the computer or processor. However, keep in mind that as you increase the RPM of a fan the noise or decibel (dBa) also increases. 1  A computers fan RPM can be measured using software tools such as HWMonitor.