I have set the 'Silent' profile from BIOS, RPM is around 1400 and CPU temp is 30C, but the fan still make like a whirling sound, like a sudden change in the RPM even there is not such a change. I have set also the temperature interval to 3 degrees. The fan is significantly louder than all the other fans, I hear it even when the case is closed and without any system load. Do you think the fan could be damaged? Thanks!