Question Let me know, please, the different meanings of the fan headers 1-6, Fan A, and Fan B on your new X9 mainboards Answer FAN-A/B is for add-on card or chassis fan and is controlled by system temp. FAN 1~6 is controlled by CPU temp. Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) Y D K U FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 13798 Other: - Assemble - Support Information Peripherals: - Cooling Fans 03/08/12 PD     Print Answer