Sys 1 & 3 fan not working..

Ricster-a

Honorable
Jan 19, 2014
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Both fans (3 pin) work when i put them into Sys fan 2 connector, i've checked the bios both fans are recognised clocked at 0 rpm any ideas?

Mb: Gigabyte GA-H87-HD3
Fans: Corsair AF120
 
In your UEFI bios, under "M.I.T. > PC Health Status" on of the options you will see is "2nd/3rd System Fan Speed Control".

Allows you to determine whether to enable the fan speed control function for the system fan connected to
the SYS_FAN2/3 connector and adjust the fan speed.

>> Normal - Allows the fan to run at different speeds according to the system temperature. (Default)
>> Silent - Allows the fan to run at slow speeds.
>> Manual - Allows you to control the fan speed under the Slope PWM item.
>> Disabled - Allows the fan to run at full speeds.
 

Do you have the Gigabyte EasyTune software utility installed in Windows? It also has a Smart Fan tab.

The Smart Fan tab allows you to specify a Smart Fan mode. The Calibrate menu displays
the detected linear fan speed for the fans on the motherboard from the fastest to the slowest.
The Advanced menu allows you to set temperature thresholds, based on which the fan speed
can be changed linearly.