Quote Originally Posted by BobBong
North bridge chipset fan.

type of mother board?
asus a8n-sli basic nforce4 mb

And i tryed to clean it out but it didnt do anything. Btw it used to do it and i would tap my heatsink fan cause i thought that was it and it would fix it. But no i try the same method and it will fix it for a second and it will go back to buzzing and not rotating properly. I dont know why me tapping my heatsink fan would fix the North bridge fan but what ever.