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Yes i dissabled all options having to to with all fans. One by one

  Variable speed fan controller, w/ no variable speed fan. This would cause the fan to have a voltage drop and do strange things such as make noise due to low voltage.!!!! ???

I am not experiencing humming it is accually a warning from the motherboard telling me that the fan has stopped and it only happens when idol so its gota be a setting. The new fan is nice and queit i guess its not all that big of a threat because it only does it when cold but scares me that it does turn off i have never had this. Nothing is stock on this pc. I built it piece by piece even windows pro sp2 on it. I use the same stuff on every pc i build this maken me think it has to be a bios setting. But i just cant find it no matter how many times i look in the bios it drives me nuts not to know i am kind of a perfectionist when it comes to my pc running fast. I am not to big into overclocking but love to tweek it in setting to make it perform faster and use programs many programs. You can have the greatest piece of equiptment on the planet and if your software sucks you pc will also.