Basic information about ReBar (picture 1 and 2):
https://www.nvidia.com/en-us/geforce/news/geforce-rtx-30-series-resizable-bar-support/

If ReBar works on your system, download Nvidia Profile Inspector (picture 3 and 4):
https://www.pcgamingwiki.com/wiki/Nvidia_Profile_Inspector
https://github.com/Orbmu2k/nvidiaProfileInspector/releases

Start Profile Inspector, select "Starfield" as Profile or locate the Starfield.exe (maybe gamelaunchhelper.exe for GamePass user) and set the setting as shown on the screenshot (picture 5). Hit Apply Changes in the upper right corner.

Done! The settings will be remembered until you install new drivers or reset the settings.
