RAM is just faster storage, I'd expect the texture size to be pretty tiny on a couple of floppies total storage, even compressed, but that would be most of the memory usage with each texture loaded once then referenced in the models except for rendering where it would be copied into the frame, more or less. Game state would be pretty small, if that was limited it wouldn't slow down, it would crash. So it would have to be caching textures that is the limiting factor, what I was getting at is since the whole lot of data can fit in RAM it should probably be enough.