The sensor can go in fan header 1 or 2, depending on what bios you have you may need to have a fan with a rpm led plugged into the fan header closest to the dim slots in order to boot up . my bios chip was marked with what bios was installed. I think All bios but ul require the fan.
They manual says the cpu fan needs to be in fan header 1 . It required a fan to run at least 2000 RPM's. thats where I put the CPU fan Now I have also put the enermax fan sensor to header 2 . Is this the correct configuration? With the addition of the High output fans that everyone is using for there OC rigs are they still putting them on fan headers designated for the cpu fan or are they fooling the board and putting any fan in there and opting for a 4 pin fan connection for the cpu fan?