Recently installed a new mobo, cpu, heatsink. Used a case from previous computer. Everytime I move my optical mouse (when red light is lit) there is a buzzing coming from somewhere inside my comp. Its not the speakers, but i think it may be the PSU. With my old mobo, this never happened. Anyone have any idea how to stop this noise, its getting reallly annoying. I cant seem to find any related problems on google or such. Then there are times that the buzzing is constant, and when I move the mouse it stops. I dont have any other mouses to try either.