With the i7 6700k for Dolphin. Is there limitations still? Will be getting a 7700k

[tigerlaws]

I will be building a new pc that will have a 7700k processor when it comes out in January and a 1070. Will I have any problems playing Wii and Gamecube games in 4k with max graphics? Are there still games that don't run well no matter what hardware you will have? Or will some of them still not run full speed with everything cranked due to cpu limitations?