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Little bit of an apples to oranges comparison there: you are comparing the highest clocked DDR4 with "normal" clock, high latency DDR3. Compare it with CL6 DDR3 and the latency is worse for DDR4, even at that max clock rate.
– psusi
Commented Oct 8, 2016 at 1:08
those are the models that the OP indicated in their links. I agree it is comparing extremes, and you are quite right that you need to exceed more than 2x frequency, or you may be suffering a hit on latency when all else is equal, but for the specific models the op indicated, the ddr4 has the advantage. I do wonder if they have a CPU/board that will support RAM at that speed, but that is not part of the post.
– Frank Thomas
Commented Oct 8, 2016 at 2:05

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