Ok, thank you for clarifying. You can always enter a console command to increase the streaming pool size within the editor. The command is " r.Streaming.PoolSize ____ and you can enter a value in after the command. For it to persist to a packaged game you will have to research where to implement this in code. Packaged games, after all of your optimization is done, should be ok to run on graphics cards with 2gb of ram. I couldn’t really say if anything less would run your game. It would really come down to what the game involves. Something with a large amount of lighting calculations, particles, or intense GPU calculations will require more VRAM.