IEI Technology SPCIE-C246 User Manual page 88

Auto mode fan start temperature

If the CPU temperature is between fan off and fan start, the fan speed change to fan
start PWM. To set a value, Use the + or – key to change the value or enter a decimal
number between 1 and 100.
Auto mode fan off temperature

If the CPU temperature is lower than the value set this option, the fan speed change to be
lowest. To set a value, Use the + or – key to change the value or enter a decimal number
between 1 and 100.
Auto mode fan start PWM

Use the Auto mode fan start PWM option to set the PWM start value. Use the + or – key
to change the value or enter a decimal number between 1 and 100.
Auto mode fan slope PWM

Use the Auto mode fan slope PWM option to select the linear rate at which the PWM
mode increases with respect to an increase in temperature. Use the + or – key to change
the value or enter a decimal number between 1 and 8.
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SPCIE-C246 Full-size PICMG 1.3 CPU Card