MSI will support the PCIe Resizable BAR feature even on older 8th-gen Intel motherboards and AMD X470 motherboards.

MSI said it will support Nvidia’s unsexy-sounding, yet performance-boosting PCIe Resizable BAR feature across many of its AMD and Intel-based motherboards.

Enabling PCIe Resizable BAR is a way to allow the technology underpinning AMD’s new Smart Access Memory feature on Nvidia and Intel hardware, too. Smart Access Memory gives AMD Ryzen 5000 CPUs full access to a Radeon RX 6000-series GPU’s memory, which can deliver varying levels of extra performance, as we found in our Radeon RX 6900 XT testing.
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https://www.pcworld.com/article/3603275/msi-will-support-resizable-bar-across-intel-and-amd-motherboards-even-threadripper.html