u must be new to hardware if u not know that simple question
GPU is ALWAYS more important than a cpu when it comes to gaming if u already have a duel or quad core then stick with if for the next 4 years or more
u want a 480 .......
unless u have good air cooling and u want to upgrade in the future good ahead
but if i was u i would buy a 5970
oh yeah and a quad core is sometimes very important like bc2 for example
E8400 =21 fps
q6600 =40 fps