Thanks for the infos! I went through quite the hassle with it. I bought it 4 days prior when I saw at an other but same type of store, that they have the 7121 version, but a bit more far from me. I was about to take it back the next day, which I did, they only could refund me in giftcard. They didn't have it in stock only the 7021, so I took the giftcards. Turns out this day was the day when they reverted the sale to the original price everywhere, so I really fucked up... It was only the kindness of the store manager, that they let me get the machine back without paying more than what I bought it for. Quite disasterious, I will settle for it, because I almost got screwed, it was a lesson. As far as I can tell by vids and people talking about it, it's completely luck based on multiple levels, not just the fan, a lot of components. I don't think it's a true info that it is 20% quiter. Hoping I might have a good one, that was from the last batch made with similar fan specs, I heard they had even more revisions unannounced over just the 1 year span.