The Intel Core i7 4930K although it is a 6 core CPU compared to the AMD FX 9590 which has 8 cores; will easily beat the AMD CPU because of Intel's superior x86 architecture.
Not being a fanboy, but I am just stating the truth.
If you are using a CPU for GAMING ONLY, then, the AMD FX 8350/9590 will be sufficient enough to be paired with a high end GPU to play modern games on 1080p or 4K resolution displays no problem.
But hands down on Intel in productivity and content creation.