I’m not on the AMD Zen train myself yet but I have read that the Ryzen platform is a bit more sensitive to memory latency than Intel.
(Not sure if that’s for regular use or just when Overclocking)
Are you sure about your memory specs? The speed that you have quoted seems a bit slow. Is that maybe just the standard Jedec profile for what might otherwise be DD4 3600 or something if using the XMP profile?
A little more info about the Ram would be helpful if you know it.
(Manufacturer, model, rated speed, how many sticks etc)