I have my cpu cooler plugged into the cpu fan header
Then my case fan is on the final 4 pin header
go on to advanced mode and these are the settings for the chassis fan
Chassis fan Q-Fan Control Enabled
Chassis fan Speed low limit 200RPM
Chassis fan profile Manuel
Chassis fan upper temperature 70
Chassis fan max. Duty cycle (%) 100
Chassis fan lower temperature 40 - -------------------------------- This is greyed out for some reason
Chassis fan Min. Duty Cycle (%) 60