Legit Reviews posted a review on the CPU Bottleneck? GeForce GTX 1080 Ti Tested on AMD Ryzen versus Intel Kaby Lake A quote from the article:

Last week, NVIDIA released the GeForce GTX 1080 Ti Founders Edition graphics card. This is the fastest desktop consumer graphics card in the world and we were torn on how we wanted to test it. We are in the middle of updating out GPU test bench and are fighting a few hardware gremlins and we thought we?d try something new and a little different for a change. AMD just recently launched it's Ryzen processor series and that is a huge architectural change for AMD. It's been many years since we?ve run graphics cards benchmarks on an AMD platform since Intel has been the platform of choice for gaming performance. Has that changed?

 CPU Bottleneck? GeForce GTX 1080 Ti Tested on AMD Ryzen versus Intel Kaby Lake @ Legit Reviews