512 mb is barely enough for eq2... I remember when i was awaiting the release and upgrading my computer, i had this game in mind, and i went to the game's website to check the minimum requirements for it, and it said something to the effect of "This game will require GPUs not even out yet to run everything on the highest settings". Of course now that SLI PCI-E exists, along with the nVidia 6800 GT, they do exist ^_^ But I have a mid range gaming computer, and it can play EQ 2 on normal decently.
Amd Athlon XP "Barton" 2800+ Core @ 2263, 1 gb Corsair PC 3200 ram, and a Radeon 9600 PRO @ 400/530. Keep in mind, this runs Doom III at high settings, and Half Life 2 @ max, and barely runs EQ 2 on normal, lol. You need a new computer, sir.
The Shadow