Okay. Whenever I put the fan speed to around 2200 to 2800rpms, I get a slight buzzing sound from my CPU fan. I thought it was the motherboard at first, but it wasn't. When I put the fan to around 85 percent in speedfan to 100, I don't get it. When I put it below 2,000, same thing. Is it the stock cooler, or a CPU fan fault in the mother board? Should I use my external fan controller to find the problem? Thanks.
Note: I isolated the problem using a field recorder with my headphone piece. Sure enough it all boils down to that area where the cpu is. I stopped the fan also mid where I should hear the beep.