Some things were clear on our tests. First, the Core i7-7740X has practically the same performance of the Core i7-7700K, what was predictable since they are very similar on most specs. Only in games we noticed a slightly smaller performance of the Core i7-7740X, which is possibly due to the fact that, on the motherboard we used, the video card works at x8 speed with this processor.
It is also clear that, just like the Core i7-7700K, the Core i7-7740X is faster than the Ryzen 7 1700X on games, but slower on tasks that use all available cores, like Cinebench, Blender, and Handbrake. We actually can say the Core i7-7740X and the Core i7-7700K are today’s CPUs with the best single-thread performance.
But what was not clear for us is what is the market Intel intends to hit with this new CPU. Socket LGA2066 mainboards are way more expensive than the LGA1151 ones, mostly because of features that the Core i7-7740X will not use, like four memory channels and the several PCI Express 3.0 x16 slots. So, a computer based on the Core i7-7700K will cost less, even if both CPUs costs the same (and it will perform the same way).
It should be an interesting CPU for high-end gaming computers if it wasn’t the limitation of 16 PCI Express lanes (the Core i7-7700K has 24 lanes, for example), which makes it a bad choice if you intend to use two or more video cards.
One of the situations the Core i7-7740X could be used is if you want to build a computer using the HEDT LGA2066 platform now with a mainstream CPU, changing for a high-end processor in the future, but is doesn’t make much sense because you will have to spend two times.
Other situation is for overclocking enthusiast: the Core i7-7740X has a great overclocking potential, better than the Core i7-7700K, because it uses a more robust platform, designed for higher consumption CPUs.
Because all of this, even being one of the fastests CPUs for gaming available today on the market, the fact it uses an expensive platform gives it a bad cost/benefit ratio.