AMD Smart Access Memory does not rely on PDEP instruction, meaning that it will work regardless of how well the instruction is supported on the CPU.There's also a rumor that NVIDIA is still considering "whether and when" to enable Resizable BAR for its GeForce RTX 30 series.
Wccftech has published two articles covering the SAM support on various AMD Ryzen CPU series that do not have Zen3 architecture. According to the screenshots published by the website, even the AMD Ryzen 4000G series codenamed Renoir will support SAM on a 500-series motherboard.
AMD Smart Access Memory seen working on first-gen Zen CPUs
Posted on Friday, December 18 2020 @ 10:27 CET by Thomas De Maesschalck