ahhh no trdrd 4 is why you are able to run 2700 so easily.
My bin for 2666-2740 on air is:
http://i.imgur.com/PHK39SQ.png
very tight but it seems to yield quality kits on cold.
Speaking of hypers, ran this last night on the air rig while testing Devils Canyon:
Silly and uninformed thing to say. Temperature plays a huge role even at 5Ghz, especially on uncore. I just tested a chip that would not boot 5Ghz 1.45v @ -20c, it ended up needing -50c to boot 5Ghz core /5Ghz uncore.
This run was not even a backup, just reran the same setup (yesterday) on a different memory pot and squeezed a whole 0.2 bclk more out of it.
Memory super tight this time, almost BBSE like, but still just good old PSC