You can't really compare to other games. Since the games might have different engines and optimization. Also a recommended stat is more or less minimum now a days. Anyway, if you want to game, increase your page file, google if you don't know how. It might ruin some performance but atleast it helps a little. Then when you have the funds buy another 8gb of ram.
I would be mad if i had 8gb of ram, pc would be too slow.