Unless the IMC or the RAMs hit a wall, I can smell DDR3-3000+ triple channel coming soon

It's my first PSC DDR3 memory clocking, so I might be wrong, and maybe the RAMs are already very close to their limit, but my gut says they're not, and I'm quite sure that they'll gain at least another 100MHz under LN2, so all in all, DDR3-3000 should be a feasible target under LN2.