As for me, on a Asus P8Z77V-Pro and 16GB (thus 4x4), 1.5V to crash yet certified by Corsair.
Switching to 1.65V for everything to work, and again, there have been some problems on heavy apps.
It would certainly still mount or modify some latency, but I prefer to stay quietly in 1333 (What ultimately matters little, certainly, but it's a shame ...)
It would be honest from Corsair to bring this memory as the overclockable 1333 to 1600, there is still a bit limited.