ASUS seems to have enabled AMD Smart Access Memory on the first generation Ryzen CPUs on its B450 lineup of motherboards.
How to use AMD Smart Access Memory and Nvidia Resizable BAR
MSI Releases Beta BIOS for AMD 500 Series Motherboards to Support
Gaming NB] AMD Smart Access Graphics Introduction
What is AMD Smart Access Memory?
Nvidia intros PCIe Resizable BAR: Smart Access Memory for GeForce
ASUS Enables AMD Smart Access Memory Support For 1st Gen Ryzen
Benchmarking AMD Smart Access Memory on Intel's Z490 Chipset
Smart Access Memory on Zen2 is official : r/Amd
How To Enable AMD Smart Access Memory
How to use AMD Smart Access Memory and Nvidia Resizable BAR
Smart Access Memory (SAM) tested with a R7 3700X and a 6800XT in
ASUS Enables AMD Smart Access Memory Support For 1st Gen Ryzen
Benchmarking AMD Smart Access Memory on Intel's Z490 Chipset
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