New drivers add performance-boosting memory-access feature to older AMD GPUs | Ars Technica
RX 5700XT - AMD Smart Access Memory (SAM) ON vs OFF | 1080P, 1440P & 4K Benchmarks - YouTube
Smart Access Memory on Radeon's RX 5000 Series Tested - A Free Performance Boost! | Forza Horizon 4 - Resizable Bar On VS Off with AMD's RX 5700 XT | GPU & Displays | OC3D Review
Smart Access Memory (aka Resizable BAR) enabled on r5 3600 and 5700xt (Large memory Range IS SAM) : r/Amd