In order to test how the game handles slower processors, we disabled a number of cores and/or HyperThreading to similate a 'Core i3', 'Core i5' and 'Core i7' from the mid-range series. The distribution of cores and threads is respectively 2C/4T, 4C/4T and 4C/8T. We kept the clock speed at 4.5 GHz. The tests were performed with the fastest graphics card available at the time of writing, namely the Nvidia GeForce GTX 1080 Ti.
As long as the graphics card is the bottle neck, for example at 4K on ultra settings, it does not really matter which CPU you use. On settings and resolutions that do not stress the GPU as much, the difference between the dual-core and quad-core becomes quite clear. At Full HD, enabling HyperThreading also seems to increase performance. The difference between the 'Core i7' with 4C/8T and enabling all ten of the cores of our CPU is quite negligible in all cases, so the game does not seem to scale with more than 4 cores and 8 threads.
|2C/4T||4C/4T||4C/8T||10C/20T||2C vs 4C||4T vs 8T|
|1920x1080 - Medium||152 fps||191 fps||210 fps||208 fps||20%||9%|
|1920x1080 - Ultra||110 fps||129 fps||138 fps||141 fps||15%||7%|
|2560x1440 - Medium||154 fps||182 fps||194 fps||200 fps||15%||6%|
|2560x1440 - Ultra||107 fps||116 fps||117 fps||116 fps||8%||1%|
|3840x2160 - Medium||113 fps||123 fps||124 fps||122 fps||8%||1%|
|3840x2160 - Ultra||74 fps||73 fps||73 fps||72 fps||-1%||0%|