Its just a marketing gimmick. The 4GB RAM will never be totally used. It will just sit there & what you pay for it comes to nothing.
that's mean 1 gb evga is best?
Better compared to GT430? The answer is yes.
But not best. In fact the GT 440 is very weak graphics card very near (if not) at the bottom rung of the contemporary graphics card ladder.
If you will tell us what monitor resolution are you playing at, we can make suggestions for video card that is more appropriate for you.