ok so today i just noticed that this high pitch noise is comin out of my comp. im pretty sure this didnt exist before because usually when i turn on my comp i am not bothered by any noise, but today i am. the noise also sounds like its droning somehow... like an oscillation. i googled some stuff and i think its my PSU. at first i thought it was my hard drives, so i unplugged them, and noise still there. then i thought it was the CPU fan. unplugged that one and noise still there. i dont think its comin out of the mobo itself, i dont see how or why that would be true (altho this is subjective). im almost sure that its the PSU. anyone can tell me why its doing it and how i can fix it? rite now its a 400W supply. not sure what brand/model. ill tell u when i open this thing again later, kinda tired rite now. if i have to buy a new one, what would u recommend? i got 2 hard drives, 2 cd/dvd roms, sound & vid card.