> You don't have to have assets loaded in RAM and also VRAM for the CPU/GPU to use them.
You typically don't want to do this anyway in games. You're probably doing something wrong if you're reading textures/meshes on both the CPU and GPU.
> Don't forget about how much more RAM a general purpose OS like Steam OS can consume versus a gaming specific OS too.
SteamOS is meant to be a gaming specific OS first. It has a desktop environment but none of that loads unless you switch to desktop mode. That's just taking up some disk space while you play games.
You typically don't want to do this anyway in games. You're probably doing something wrong if you're reading textures/meshes on both the CPU and GPU.
> Don't forget about how much more RAM a general purpose OS like Steam OS can consume versus a gaming specific OS too.
SteamOS is meant to be a gaming specific OS first. It has a desktop environment but none of that loads unless you switch to desktop mode. That's just taking up some disk space while you play games.