Every motherboard has its memory specifications, and most of the time, the motherboard does not run memory at higher clocks than the specified rate. Moreover, the maximum supported memory clock rate depends entirely on the particular motherboard model, where some of them can do as high as 5000 MHz, while others are limited to 4200 or 4400 MHz. Most B550 or X570 motherboards can do at least 4400 MHz, higher than 90% of memory kits.