i'd like to buy a computer, this'll be my first computer purchase on my own and i have absolutely no idea what i should get, all i know is that i'd like to be able to play halo 2, and that requires "NVIDIA 6100, ATI X700, or above."
on circuit city's specification sheets, i've seen nothing mentioning NVIDIA 6100 or ATI X700... what do i look for?

circuit city spec page of computer:
http://www.circuitcity.com/ssm/Specifications-of-eMachines-Desktop-PC-T5062/sem/rpsm/oid/185299/rpem/ccd/productDetailSpecification.do#tabs

maybe the nvidia 6100 or atix700 is on there, but disguised as something else?
please help?