JimF_35 :
Most games can not use past 4GB so you should be safe but there are new games coming out like Star Citizen that will require more memory. If you can get 8GB and can afford it then you might consider it. You might just save your money for a new system though because that one is kinda old.
Just very light gaming, besides, the graphics card is anywhere from 15 dollars more, to 30 dollars less than the adapters, depending on which one.
Again, thanks Jim, youve been a big help.