What setting have you selected in bios focus? Does seem a bit strange then, i tried a few different 3 pin fans but all ran at 100%, hence my switch to PWM fans.
Looks like I am talking total rubbish. Just checked the CPU fans and they are always running at full regardless of CPU temperature.
Thinking about it I did notice the CPU fan change speed change when I had a Noctua U12P but I was using some Akasa fans with the PWM splitter.