Killi's experience on 2 units proves its not isolated to just my single unit.
Curvin, probably I wasn't enough clear, maybe due to my english: you had a bad experience with a single Platinum 1200W and that's all (and our community and me are glad to know about those experiences, as that will help all of us: and the same thing goes for Killi and his two 1200W units).
About that, you can either think the PSU might be flawed (as the Seasonic Sales Rep suggested as a possibility for the relevant first production run, if I understood him correctly), or alternatively you can think the Platinum 1200W is just a not quiet unit (due to some design flaw, like TechPowerUp! also suggested, and like Killi maybe already thinks): and definitely I think that your comment should reflect one of these two options.
So, given that the whole Platinum-series product lineup includes as many as *nine* different models, not just that 1200W one, it's not fair or you're not entitled to say: "avoid any of the Seasonic Platinum Series"
; also because those nine models are based on three different fanned platforms (the one of the 1200/1050W models is different from the one of the 860/760/660W models, which is different from the one of the 1000W model), and given that there are three fanless models in the very same Platinum-series (so, with reference to them, there's no fan controller which could be flawed, isn't there?).
The SPCR community is meant to serve all of us, not to support either in favor or against this or that brand (please, pay attention: I am not saying you are a sort of fanboy, afaik you're just a rightly dissatisfied/disappointed customer/user), and that needs the most veritable comments: I hope you'll understand this point.
About me, I'm just taking care of our "courtyard"/"playground", as any of us should want to (that's what a community is meant to be, isn't it?), with kindness and patience and at best of my language proficiency.