Is more RAM going to make any difference?

[Stan Loh]

I've got 512mb of ram on the 3 year old laptop I play on. Its running XP and P4. It's moderately smooth. Is 1gb of ram going to make a huge difference? I mean with 512 I can play all sort of 3d games and stuff. Is it really going to improve on these poker software (FTP) that doesn't seem to require much? Upgrading laptop ram is really expensive and I don't want to spent unnecessary cash if I can.