AAEON TKS-G21-QM77B - Manual (Page 60)

E m b e d d e d B o x T K S - G 2 1 - Q M 7 7 B
Fan stops when temperature is lower than the given value in Degree
C
Fan Start 0 to 100, default is 40
Fan starts when temperature is higher than the given value in
Degree C
Full Speed 0 to 100, default is 90
Fan runs in full speed when temperature is higher than the given
value in Degree C
Slope(PWM/Degree
C)
0 to 15, default is 5
Slope[1-15] PWM/Degree C for Fan Speed Control
Chapter 3 AMI BIOS Setup 3-23