Alongside the launch of its midrange RX 6700 XT, and shortly after the arrival of the NVIDIA GeForce RTX 3060, which brought resizable BAR support to a range of chipsets and CPUs, AMD announced that Smart Access Memory would be making its way to Ryzen 3000 processors.
https://www.notebookcheck.net/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-RTX-3070.526197.0.html