User`s manual

Tcpu (SmartFan Hi-Limit)

Select the minimum temperature before fan operates at 100% speed

The SmartFan function allows the user to increase or decrease the speed of the fan.

This, in turn, provides control over the cooling and noise that is generated. To

enable this function, CPU Fan PWM Control Mode should be selected as

SmartFan. The Tcpu (SmartFan Lo-Limit) setting sets when the SmartFan

function will be triggered, and SmartFan PWM Start would indicate the starting

speed of the fan. Next choose a SmartFan PWM Gradient that will describe

the incrementing step for each increase of temperature. (See image below.)

Lastly, the Tcpu (SmartFan Hi-Limit) will determine when the fan should be

adjusted to max speed when the CPU gets too hot.

For example, if the “lo-limit” was set at 35ºC, “PWM start” at 30%, “PWM

gradient” at 1.56%, and “hi-limit” at 65ºC, then the fan will initially be at 30%

duty cycle. At each degree of temperature increase, the fan will increase 1.56%

duty cycle. Therefore at 36ºC, the fan will operate at 31.56%, at 37%, it will be at

33.12%, and so on. At 65ºC, the fan will jump to 100%, and decrease when the

temperature lowers.