There seems to be very few reviews of the higher wattage Corsair CX V2 series. This is the first one I have seen:
http://www.xbitlabs.com/articles/cas...n_5.html#sect0
It looks to be a group regulated unit.
However,the CX V2 series has been now replaced by the CX V3 which have 80+ Bronze effiency and the new CX Modular series.