[RYZEN] My ram speed is stuck at 1066/1333mhz

I have a Ryzen build with an MSI B350 motherboard. I've tried both A-XMP and manually overclocking the ram to the advertised speeds on my ram which should be 2666mhz. Nothing seems to be working for me. CPU-Z and Windows Task Manager are displaying 1333mhz and sometimes show 1066mhz.