Lower Fan Speeds?

[greathelp]

SpeedFan doesnt lower my fan speed ( I dont think it detects it? ) and the motherboard doesnt do a good job of keeping the fan speed down when the temps are low. I have a z75 pro 3 motherboard with the fan Im trying to control in cha_fan2. This is not the cpu fan just a loud case fan that I have installed. Thanks in advance

 

[greathelp]

So after some googling It looks like I wont be able to control any speeds because the fan is a 3 pin and I have it connected to a 4 pin on motherboard. Can anyone confirm this?

 

[Dark Lord of Tech]

Yes

 

[greathelp]

Yes

There is no way of z75 controlling the fan with voltage?