Memreport.
Try this it’s got more info:
Or basic math. If the full texture needs to be in ram, then the size of the texture at its size on disk is loaded in ram and avaliable to “stream” I guess (its more “render”).
Excellent occasion to export the model to blender and create split models with individual sections without changing anything at all.
Also, it’s not uncommon to get stuff that’s half not visible ever. When using kits particularly.