Shadowblix

For those ASUS (and maybe applied to others) motherboard owners, i had an exact issue as the first one described at the beginning of this long thread. My RAM: CMU16GX4M2C3200C16B My board: ASUS TUF Z270 MK2 (and other specs in my profile) Symptons: Unable to XMP, not even POST after reboot, disabling XMP would give no boot problems but ram stuck at 2133mhz while mine is 3200ghz I even tried updating BIOS, nothing. What they did: In the BIOS: Set all Fan profiles from normal to Turbo. (All, Case Fans and Cpu fans) Apparently ASUS boards have this weird safe protection that would not let me enable XMP unless the fan profiles are higher than normal to avoid possible overheating Anyways thats all they did and it works!!! RAM at 3200mhz no issues whatsoever and 5 days have passed since then and all good. Let me know if this information helps anyone else!