Hi you need to conncet pin 1 + 5 on the motherboard CPU fan connector ( or on fan connector side). This is how BIOS determines if you have 'high power' fan. In original high power fan these pins are just bridged. Pin 1 is GND, so then on pin 5 also has to be GND. I bridged it to computer chasis and BIOS stopped complaining.
Greetings
