Small update : before chosing my future setup that will go inside my Cerberus-X I'll made a prototype using my mini ITX Z97 board, with core i7 4770K and GTX1070 gaming X, just to see what options (cooling, mounting point, etc) I truly have inside Cerberus-X..
As I want to wait for Vega 10 customs card release I will have to wait for july/august...that means simply I'll wait for X299 platform then to replace my prototype setup..