My current pc specs. My frame rates are nothing wonderful but they are solid. At about 1/2 settings on all the graphic effects i run at roughly 40 fps. If i lower the view distance then it will go up slightly to about 48 fps. More then enough for traveling the world as well as raiding.
http://valid.canardpc.com/show_oc.php?id=1300891
And now a question inside of a question.
Do you think i would get more performance if i ran windows 64 bit?