Both CPU fans are spinning close enough to each other for them to have issues. So I can only think that you are revering to a Case fan and the exhaust fan is mounted on the back of the case. I see the fans all seem to be around the same for case fans.
I guess I'm just having a hard time understanding exactly which fan is giving you the trouble. Could you explain a little better?
Since your using speed fan, it begs the question of, is speed fan controlling the CPU fan? also did you install the Motherboard software that can control fans?
your CPU fan is running full blast. I'm not sure what the setting name is for Intel but there is a setting the turns PWM off for the fan. AMD is called cool and quiet. also be sure you hooked teh fan to the CPU_fan header on the motherboard.