My xmp settings simply doesen.t work, when i put xmp on it still says 2133 on every program Cpu-z, hwinfo etc and even in bios at the front page, same with trying putting it manually at 3000. I tried once to put it manually to 2933 and it would not boot, but on the front page where i went to change it back to normal would apeear that is indeed changed to 2933. Btw my rams are 3000Mhz.
So when i try changing it to 2933 it does change but not boot, but when i try to xmp or put it manually to 3000 nothing changes.
ASRock will default to lowest common speed if it fails to run the ram at set speed upon bootstrap (startup) This is indicated by the system rebooting several times and the fans running at full speed for longer than required.
RAM speed is a function of quality of RAM, CPU type, voltage, and number of banks filled on said motherboard.
For example with my Raven Ridge, I could only get 2933 speed working on my 3000 DDR4 memory with all 4 banks populated. If I went to two sticks, everything worked. If you read the manual it will tell you something similar. It has a maximum supported speed for a given CPU given the number of banks filled and if 1D or 2D. You are running overclocked for Raven Ridge. For Raven Ridge only 2666 is officially supported, and IIRC even less for 4 banks filled. Everything else is over clocking.
Now on my AsRock ITX Fatal1ty motherboard, I can run 3200 all day and all night on my raven ridge. But again this is still overclocked and outside spec. But ITX motherboards are known for better memory overclock because the traces are shorter and fewer.