I've tried to overclock 3 680s that would only reach 1200-1240 boosts no matter what. And even at those speeds, they required manual fans at high settings to prevent the 70c throttle area, and would sometimes TDR in extended gaming sessions (such as crysis 2 maxed with vsync off) My 690 maxes out at +150 offset. To say that 1400 is easily achievable seems ludicrous to me, having overclocked quite a few 680s myself. I may have gotten incredibly unlucky, but thats just my experience...having said that, thats not say that I wasn't pleased with performance at those clocks. Performance was just fine.
Of course, aftermarket 680s will do a bit better with some reaching the 1300 range. Anyway---like you, i'm very anxious to try the lightning or classified cards, i'm pretty excited about what voltage control will do. If 1400mhz is realistic, i'll be all about it
Edited by xoleras - 6/16/12 at 4:51am