System tests
There's little benefit in investing in super-high-speed DDR4 even when the octo-core CPU is running at 4.0GHz on all cores. The three quad-channel packs benchmark eerily close to each other; enough for the results to be within the standard deviation of multiple runs.
Why is this, you may ask? The super-efficient DDR4 memory controller on the Core i7-5960X CPU is one reason. A surfeit of bandwidth produced by a quad-channel architecture is another, and, finally, the massive amounts of on-chip cache is a third explanation why frequencies and latencies of external memory don't show a manifest difference in performance.
