Ive had 2 480W purepower PSU units from Thermaltake over the past 5 months, one obviously being a replacement for the original one I purchased. my problem with the origninal one was that I could hear a very noticable static/buzzing type noise coming from the PSU when it was turned off (obviously it cant be heard when its going). You have to be within a few feet of the PC to here it, but if you put you head down by the case its very apparent. Well anywayz, the replacement is doing the exact same thing! Im beginning to wonder if this can be considered normal. I want to know from other pure power owners if they have experienced this kind of sound eminating from the the PSU. Im worried the damn thing will just blow one day lol.