The OCZ V2 had the optional Xigmatek backplate and a NF-p12-1300 fan for the i7 testbed. Stock speed was w/ stock voltage ;) 3.42 was 1.28v or 1.3 (in that vicinity...don't have my notes here in front of me but thats the ball park IIRC, i'll check my notes later and edit if necessary), 3.8 was 1.45'ish. I can not for the life of me remember vtt/pll settings but they were lower than the core voltage by a slight margin. The biggest thing to remember is that this is on an open bench and is the absolute best I got. I mount and remount and remount....and remount until I get the right combo of TIM and direction, then and only then do I run the "official" tests (with another 3 remounts taking only the best of the best).
All the backplates I have used so far have had no probs handling the i7 built in backplate as they are "deeper" than 775 versions. If I come across an issue I promise I will make note of it in the review!