User Manual

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PRIME X399-A BIOS Manual
COV Fan Upper Temperature
Use the <+> or <-> keys to adjust the upper limit of the COV Fan
temperature. The COV Fan will operate at the maximum duty cycle when
the temperature source is higher than the limit.
COV Fan Max. Duty Cycle (%)
Use the <+> or <-> keys to adjust the maximum COV Fan duty cycle. When
the temperature source reaches the upper limit, the COV Fan will operate
at the maximum duty cycle.
COV Fan Middle Temperature
Use the <+> or <-> keys to adjust the middle limit of the COV Fan
temperature.
COV Fan Middle. Duty Cycle (%)
Use the <+> or <-> keys to adjust the COV Fan middle duty cycle.
COV Fan Lower Temperature
Use the <+> or <-> keys to adjust the lower limit of the COV Fan
temperature. The COV Fan will operate at the minimum duty cycle when
the temperature source is lower than the limit.
COV Fan Min. Duty Cycle(%)
Use the <+> or <-> keys to adjust the minimum COV Fan duty cycle. When
the temperature source is under the limit, the COV Fan will operate at the
minimum duty cycle.
Allow Fan Stop
This item allows your fans to run at 0% duty cycle when the temperature
of the source drops below the lower temperature. Conguration options:
[Disabled] [Enabled]
M.2 Q-Fan Control
This item allows you to set the M.2 Q-Fan operating mode.
[Auto] Detects the type of M.2 Fan installed and automatically switches
the control modes.
[PWM Mode] Enables the M.2 Q-Fan Control feature in PWM mode for 4-pin M.2
Fan.
[DC Mode] Enables the M.2 Q-Fan Control feature in DC mode for 3-pin M.2
Fan.
[Disabled] Disables the M.2 Q-Fan Control.
M.2 Fan Q-Fan Source
The assigned fan will be controlled according to the selected temperature source.
Conguration options: [CPU] [MotherBoard] [VRM] [PCH] [T_Sensor] [EXT_Sensor1]
[EXT_Sensor2] [EXT_Sensor3] [Multiple Sources]
• For EXT_Sensor1-3, connect a Thermistor cable to one of these connectors, then
tape the other end on a critical component to control its temperature.
• For Multiple Sources, select up to three temperature sources and the fan will
automatically change based on the highest temperature.