Hi cmlistz,
Welcome to the ROG forum !
Going higher speed puts more strain on the cpu's IMC and I suspect this is the issue. You may get better results setting your ram manually and raising a few voltages.
I'd try resetting to defaults (F5)
Dram Frequency - 4266MHz
Dram Voltage - 1.45v - up to 1.50v is safe
CPU VCCIO Voltage 1.25v - 1.30v
CPU System Agent Voltage - 1.25v - 1.30v
Tweakers Paradise: DMI Voltage 1.25v - 1.30v
Dram Timing Control:
Set primary timings of your ram kit with a command rate of 2N or 2T
Should look like this as the middle two are tied together.
17
18
38
2N
F10 and Enter, cross our fingers it boots.
Does this make things any better?