bestcovery.com gives G.Skill Perfect Storm DDR3 2133 6GB (3x2GB) the winner of best DDR3 memory for performance

Currently the fastest running DDR3 memory on the market at the time of this writing, the G.Skill Perfect Storm series of DIMMs run at an unusual and unstandardized DDR3 2133. It appears that G.Skill has factory-overclocked these modules to the fastest safe speeds possible for those looking to push the boundaries of current consumer technology. Representing the fastest DDR3 factory-clocked in the market today, these modules don't come cheap, but the sheer amount of bandwidth provided by the huge frequencies is sure to last for many newer processors that are inevitably going to come out from either Intel or AMD, insuring the very best RAM for overclocking. Its timings are similar to other DDR3 2000 memory, so if the extra boost in frequency is a necessity (especially at its 1.65V) the G.Skill Perfect Storm series of memory represents the ultimate in DDR3 technology.