Should I upgrade my CPU as well?

[Dave3000]

I right now have an i7-4930k CPU and a GTX 780 Ti graphics card. I'm going to be upgrading to a GTX 1080 Ti maybe later this month. Should I upgrade my CPU to an i7-7700k? If I was to upgrade to a Ryzen 1800x instead of the 7700k because of more cores, then I might as well stick with my 4930k? My 4930k scores 138 in Cinebench 15's single core CPU test and 961 in the multicore test. The Ryzen 1800x scores 161 in the single-threaded and 1628 in the multi-threaded test in Cinebench 15. Going with the 7700k means I will get a big performance increase in apps that use 1-4 cores and but performance in apps that use more than 4 cores the 7700k is almost as fast as a 4930k based in what I saw in Cinebench 11.5 and 15 in reviews. I use my PC for mainly gaming and lightly threaded office work. I also will be buying X-Plane 11 and if the 7700k performs much better than the 1800x in that game and I buy the 1800x then I will be disappointed because CPU performance matters more in flight simulation games. So should I stick with my 4930k or upgraded to a 7700k or upgrade to a 1800x?

 

[escrow4]

I'd wait until Skylake X rather than a 7700K. If you must, then 7700K. Ryzen is very new and very optimized. Kaby Lake at least is polished.

 

[guachi]

If you upgrade to a 1080Ti you can always wait for benchmarks and see (hopefully) different CPUs tested.

I assume that if you get the 1080Ti you'll be gaming at something above 1920x1080 resolution. If that's the case you might find that there are CPUs where the fps is basically the same.

You don't appear to have any other use cases that really push the CPU, so you can wait and hopefully get all your answers from gaming benchmarks.