Identification system and electronic system for identifying a fan type of a fan

A fan identification system for identifying a fan type of a fan in an electronic system, comprising:

• a controller, the controller comprising:
• a setting module for setting a first fan identification characteristic value, the first fan identification characteristic value corresponding to a PWM (pulse width modulation) duty cycle with a substantial maximum difference between a fan speed of a first type of fan and a fan speed of a second type of fan;
• a reading module for reading a stable fan speed value of the fan after the fan receives the first fan identification characteristic value and is initiated with the fan identification characteristic value;
• and
• an identification module for identifying the fan as the first type of fan or the second type of fan based on which fan has a predetermined fan speed that is the closest to the stable fan speed value when operating at the fan identification characteristic value.