Do you already have a 5770?

One of my friends have a PC with 5750, crap proccessors and 2gb ram, he runs Left 4 Dead 2 with beautiful graphics and no lag, so if you aren't planning to play any games with higher demands, you don't need to upgrade.

And WoW i can even play on my laptop with a HD 3650 (Or something), but i didn't play it for more than 3 hours... i don't like wow, at all.