For people (like me) who don’t know what a resizeable BAR is and whether or not they want one: https://www.pcguide.com/gpu/what-is-resizable-bar/
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Resizable BAR (Base Address Register) is a PCIe capability. This is a mechanism that allows the PCIe device, such as a discrete graphics card, to negotiate the BAR size to optimize system resources. Enabling this functionality can result in a performance improvement.