AMD Ryzen 5000 "Zen 3" CPUs to support higher clocked Memory, DDR4-4000 MHz kits recommended
Ryzen Above: Best Memory Settings for AMD's 3000 CPUs, Tested - Tom's Hardware | Tom's Hardware
Here is why AMD might never include Smart Access Memory support on Ryzen 3000 and older models, while 6-year-old Intel CPUs can still benefit from this feature - NotebookCheck.net News
Ryzen 3000 Matisse Official Memory Support listed by AsRock : r/hardware
AMD's Smart Access Memory comes to Ryzen 3000 CPUs like the Ryzen 5 3600 as NVIDIA starts its own Resize BAR rollout: could help push the RX 6700 XT past the GeForce
Best RAM for AMD Ryzen 3000 Processors: Impact of Memory Frequency on Gaming Performance | Hardware Times