For any user interested in performance, memory speed is an important part of the equation when it comes to building your next system. This can apply to any user, from integrated graphics throughput to gaming and prosumer environments such as finance or oil and gas. Individuals with an opinion on memory speed fall into two broad camps, from saying faster memory has no effect, to the ?make sure you get at least XYZ?. Following on from our previous Haswell DDR3 scaling coverage, we have now secured enough memory kits to perform a thorough test of the effect of memory speed on DDR4 and Haswell-E.