I've got 4GB and Elite: Dangerous works a charm. I've monitored its RAM usage and it has been very low so far. Of course, the full game could be much more intense...
Mind you, if I was building a new computer I would probably stick in 16, as it helps future proof things. When I built my current computer a lot of people had 1 or 2 GB, but I went with 4GB so it would last me longer - it has certainly worked well.
Mind you, if I was building a new computer I would probably stick in 16, as it helps future proof things. When I built my current computer a lot of people had 1 or 2 GB, but I went with 4GB so it would last me longer - it has certainly worked well.