Today I configured a Dark for a friend and was as easier to OC as OC Formula. Great score Luumi, such a strong 7900X you have there. MB is good choice too!
Thanks Bruno, already sold CH6 and went for CH7 (discounted pack at NewEgg with 2700X). Did sometime ago 3900C12 easy with X470 Gaming 7 WiFi, but was impossible with CH6. Seems X470 is way to go to max out this CPU.