X470 Case Fan Curious Behavior

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   I am seeing unexpected, but welcomed behavior with my non-pwm case fans (Corsair AF120 LED 3-pin).  I have them connected to the X470 Taichi Case_Fan2 port and expected them to be spinning at 100% all the time.  However, it seems that I can control them with Asrock's A-Tuning.  As I play with the fan curve, the speed of the fans increase/decrease accordingly and the fan's LEDs get brighter/dimmer as well. 

Was I mistaken believing that a 3-pin fan's power is fixed?

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butchboy Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 17 Jul 2019 Status: Offline Points: 48	Post Options Post Reply Quote butchboy Report Post Thanks(0) Quote Reply Topic: X470 Case Fan Curious Behavior Posted: 14 Aug 2019 at 4:22am
	I am seeing unexpected, but welcomed behavior with my non-pwm case fans (Corsair AF120 LED 3-pin). I have them connected to the X470 Taichi Case_Fan2 port and expected them to be spinning at 100% all the time. However, it seems that I can control them with Asrock's A-Tuning. As I play with the fan curve, the speed of the fans increase/decrease accordingly and the fan's LEDs get brighter/dimmer as well. Was I mistaken believing that a 3-pin fan's power is fixed?

butchboy Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 17 Jul 2019 Status: Offline Points: 48	Post Options Post Reply Quote butchboy Report Post Thanks(0) Quote Reply Posted: 14 Aug 2019 at 4:29am
	HA. Google is my friend. I guess the Taichi x470 MB can regulate the voltage of the case fan ports, and thus control the speeds of the 3-pin fans.