How did you even run anything atall at 512 MB RAM?Well, most games use like 1.2GB so you should be borderline fine with games like Minecraft and L4D and stuff.
I should at least be able to run fallout 3 with less of a problem now, right?Also I don't normally play modern PC games, I usually play older 90s to early 2000s.
Then get an extra 1GB for safety
1GB costs money.
ram dun cost much. can buy 4gigs of any type for 100 bucks.