MaxxMem2 PreView is a handy, free program to rate memory performance. It can be downloaded over here.
The 2133MHz Viper 3 memory offers the best overall MaxxMem2 performance when overclocked. The 2400MHz G.Skill TridentX and 2133MHz Patriot Viper Xtreme Division 2 kits achieve slightly better memory copy results; whereas the overclocked Viper 3 kit shows chart-topping performance in both the memory read and memory write tests.
A healthy latency decrease was provided by the higher frequency of our 2261MHz 12-12-12-27 overclock.