The 5820K has shown that a strong boost in CPU performance can be obtained for a reasonable price increase over the LGA 1150 Core i7 CPUs. And many of the X99 motherboards sit well below £200, making them affordable to enthusiast buyers. But where that entire value logic of Intel's X99 platform starts to fall short is at the expense of DDR4 memory.

One way of keeping costs to a minimum is by opting for a slower (therefore cheaper) memory kit. We test ADATA's 2400MHz XPG Z1 16GB DDR4 kit to see how it stacks up against the higher-priced, faster alternatives.