It's potentially nice to get some level of support, at least unofficially ... Hence, AMD and Nvidia have Resizable Bar profiles for each game. Intel's Arc A-GPUs should always have ReBAR enabled ...

The new update is significant as it adds support for the Resizable BAR feature to its cards. The VBIOSes are available on the Chinese websites of the respective companies and you can download them ...

while with AMD the support is a bit trickier and could vary between different CPU models as older Ryzen and Athlon parts may not be compatible with the feature. PCIe Resizable BAR allows the CPU ...