Mainstream CPU performance taken to the next level. Intel's Coffee Lake-S flagship, the Core i7 8700K is - in our view - the fastest gaming CPU that money can buy right now, but what if you don't have £350/$350 to spend on a new processor? The new i5 line looks almost as exciting, bringing six physical cores to the mid-range market for the first time. The 8600K continues Intel's tradition of cutting hyper-threading and reducing clocks while leaving overclocking as an option, shaving off £100/$100 in the process. However, just as intriguing is the i5 8400 - a £180/$190 hexacore offering that offers remarkable value. Going into this review, we had plenty of questions. Bearing in mind how brutally powerful the 8700K is, to what extent is hyper-threading necessary? Is the i5 just as good once overclocking is factored into the mix? Just how fast is the more budget orientated 8400 and how does the new Coffee Lake-S stack compare to last year's Kaby Lake? If you're sti...