[citation][nom]thecolorblue[/nom]They look nice. What benefit is there to going above 1600 though?[/citation]
It depends on the job. As rebel1280 pointed out, integrated graphics performance can be greatly affected by memory bandwidth.
For CPU performance, there are several tasks that can benefit form faster memory too. For example, compression/decompression, rendering, AVX workloads, some types of folding, and more all benefit from faster memory to a degree.