I have a 5 year old(?) Antec Neo HE 430 http://www.silentpcreview.com/article273-page1.html Recently, sometimes, it seems to give a high pitched squeal. Tho I'm not entirely sure it's from the PSU. But I replaced all the innards but the PSU. I have a 263w system https://pcpartpicker.com/list/PmThHh It doesn't squeal all the time, so I don't know if it's something I should live with, if I can oil the parts, or what.