Now that the new Intel Core i7 platform is on the market and consumers are looking into building systems for the holidays Legit Reviews takes a look at four different memory speeds to see if going with faster memory is worth the extra cost. We run the kits at 1066MHz, 1333MHz, 1600MHz and 1866MHz on five different benchmarks to see if any difference can be noticed by just changing the memory speed in the BIOS.