Faint whistle noise

[junglicious]

So I get this faint whistle sound when the computer does certain task. It comes and goes and is very faint. I do not hear it if the computer is idle. Two example are when I move the FireFox web page scroll bar or when I go through different email messages in Windows Live Mail. I tried to isolate the sound and it sounds like it came from the motherboard NB area or around where the GPU/CPU area. Its not an alarm beep, but a faint whistle sound. I read somewhere about faulty capacitors doing this. Anyone have any idea?

Thanks

 

[astyler]

Could it be your CPU fan revving up as CPU load increases? MBs tend to scale voltage on the CPU fan based on temperature when on default settings, and your fan might be dying.

 

[junglicious]

Could it be your CPU fan revving up as CPU load increases? MBs tend to scale voltage on the CPU fan based on temperature when on default settings, and your fan might be dying.

Its not the fan. I did switch the fan and my CPU fan is always running at full load. Thanks for the input though.

 

[robman_rob]

i think i have the same, and i believe i am hearing the electrical stuff, but I don't know what. it sounds when certain things happen, like when i move my mouse... disabling onboard sound helped a lot.