oh well, a newbie is not a noob as stated before
a noob is someone who is rather annoyong, m4y tlk liek tis on purpos and make what they write really unreadable, they can be someone with teh failing ability to learn too. it's also been a scolding word at some too, like if you die you call the person a noob out of anger, like if you in real life call someone an idiot but they're smart.
A newbie is stated before, just someone new to something, which could be a game.
Noob has like any other scolding word evolved to be a friendly term used amongst friends to tease em' too.
Hope that explained it