Really should be in the hardware forum... but...


A 4GB RAM, Dual-Core setup can easily quadbox if you reduce settings low enough and your graphics card is relatively recent. I don't know which model of ATI card you have, but you could easily buy a $150ish nVidia card right now that would allow quadboxing with no other upgrades.

You might chug a little in shattrath at busy times, but the rest of the game (including arena and AV) will be workable with a dual-core, 4GB, recent video card setup.