i have a z370 asrock taichi mb with a 8700k . Ive tried to set the voltage slightly higher and did get 2900mhz but it was unstable. Another rout i did was leaving the voltage "1.35" and higher the processor to 4.7 and was able to get it at 2900mhz again.I tried the xmb but it would just reset back to 2133mhz. Currently i have the processor at 4.6 ghz and the ram at 2800mhz. I cant seem to figure out how to get the rated 3000mhz? Help!! lol