I am worried about that high profile RAM going to hit your Hyper 212. Get Vengeance Pro or Ripjaws instead.
Are these both low profile? Also, how can you tell? Is there any difference between these two aside from the model number including an 'a' in the first one. http://pcpartpicker.com/part/corsair-memory-cmy8gx3m2a1600c9a http://pcpartpicker.com/part/corsair-memory-cmy8gx3m2a1600c9
Vengeance Pro is good enough, not exactly a 'low profile' design, but it does fit even under my NH-D14. The normal Vengeance series might be OK with the Hyper 212, but you can't use the leftmost RAM slot.