I'm currently running 5 on my box. It runs fairly well on lowish settings with 6gigs. Once I bump up to 8 I should run rather well on medium settings all around. Unfortunatly, EQ2 is not the kind of game that's meant to be run on highest settings, so you'd have to find the tweak guides to see what out of the dozens of settings you can drop down for the most impact in saving resources.