When we review memory DIMM modules often it's all about memory timings and the highest frequency possible, especially the latest high-end generations memories can manage 2000+ MHz, P67 and Z68 motherboards already can support 2133 MHz slices of DDR3 lovin. Trust to be told here though is that all our reviews indicate that after 1600 MHz performance you will need to seek really hard to see a noticeable difference in performance. Hence most of our recommendations always have been this: it's better to get more memory than faster memory the better choice over faster memory.