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Seems like it's possible that Intel are using up excess 4770k dies, slapping the extra capacitors on the bottom and shipping them out.
If that was the case it's bad for those that purchased these 4790K's early.
But then who's to say the later ones will be any better?
I definitely won't be changing my 4770K for one.
It's like getting a 4770K again just with a different name.