My Brother is Rigging up another PC specifically to play WoW,and other games on the side.
Everything is down packed but the Video Card, I recommended he get a 8600gt since he isnt going to be playing any hard core games, and it gives him the choice to play games on the side.
because of his budget he has a choice between a 512mb GDDR2 8600gt, or a 256mb of gddr3.
if his motherboard doesn't have support for DDR3 then I don't know what's the trouble in picking the 256 or what's the meaning of it being superior at all, I could be missing something perhaps
the 512 it's far superior even if the DDR3 it's a little more clocked than his DDR2 counterpart