Hi! I recently set up my desktop after having left it at another house and I'm having a strange issue. Everything seems to be working just fine but the PSU fan is revving up and down constantly. Even as I write this the fan does not stay at a constant speed and continually changes speed from being barely noticeable to being quite loud. I'm not sure if I'm only noticing this now because my computer is finally on a hard surface (it used to be on a dense carpet) or if there is something wrong. I am watching my CPU heat (not that the PSU fan adjusts for that) but the cores in my i7 2600k are running at comfortable 32C so way under max. Apart from this fan speed change everything runs great. Any thoughts?