A lot of people are repeating the same thing, but what I'm not seeing is an explanation. Last I knew, it was the non-reference design that was almost extinct, and any non-reference designs that did exist were designed to eke out the most juice possible.
Since when did the opposite occur? Is this an ATI-specific development?
Well, apparently the non-reference 5870 eliminated the reference volterra voltage regulators which allowed voltage tweaks via software rather than hardware as it's been traditionally done on all other videocards. Also, non-reference cards are supposedly built using cheaper parts and therefore have lower overclocking ceiling.
And you are entitled to yours, but that does not make it "right" any more than mine is "wrong" because it differs. Have a good one.
lol, ran out of arguments? well, sir, that's fine by me