AMD brands this feature “Smart Access Memory” (or SAM), but it’s basically the same technology with different branding, additional driver-level work for games, and a few extra tweaks in usability. AMD’s Smart Access Memory is limited to machines using AMD processors in tandem with AMD graphics cards—you can’t use it if you have an Intel CPU and AMD GPU (though you can enable standard Resizable BAR support). Nvidia’s implementation works no matter what CPU you have, but only enables the technology for games Nvidia has tested, rather than AMD’s “across the board” implementation.