Gigabyte GA-Z77X-UP7 User Manual page 52

& 2nd System Fan Speed Control (SYS_FAN2 Connector)
Allows you to determine whether to enable the system fan speed control function for the system fan
connected to the SYS_FAN2 connector and adjust the fan speed.
Allows the system fan to run at different speeds according to the system temperature.
Normal
(Default)
Allows the system fan to run at slow speeds.
Silent
Allows you to control the system fan speed under the Slope PWM item.
Manual
Allows the system fan to run at full speeds.
Disabled
& Slope PWM
Allows you to control the system fan speed. This item is configurable only when 2nd System Fan Speed
Control is set to Manual. Options are: 0.75 PWM value /
BIOS Setup
C ~ 2.50 PWM value /
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