i read about that the noctua NF-F12 are too weak for the S9. I have some on my S5 and the work like a charm!
Not tested this(Noctua NF-F12 iPPC-3000 PWM) on S9 but I'm not happy with them on S5:
http://i.imgur.com/WZEnmIC.pngQuite high temperature on low frequency, continuous work on 2880 rpm, no magic. Maybe I'll test them with one big fan before go back to the original fans.
