i think i know what u mean now .. i seem to be getting the Noise now in my PC but from what i asked me mate todat who works in computers an he is pretty qualified, he aint sold me dud stuff,
. put ur hand down near the HDD's an see if that slows or stops the noise on he side of the case, if it does, u got nothing to worry bout but it might be something to keep an eye on , its a Western Digital Drive aint it?.. im not a Great fan of them