I I just bought 16gb of 3000MHz ram to add to my existing 16gb 3000Mhz for my PC, and I can't change the frequency to anything but the default 2133Mhz. I tried all the AXMP profiles, manually setting the frequency, etc. to no avail. FYI, the PC does recognize that I have a total of 32gb of RAM installed now. Also, every time I went out of bios to save the settings, my PC would uncontrollably turn on and off for like 2 minutes, and then it would be fine. I am kind of a newbie to software settings so anything would be helpful!