Well that depends on few things first off what resolution do you typical run games at, 2nd is your cpu overclocked,
if your running at a low res and, it isn't overclocked then yes it will blockeck the 470,
but at something like 1080p or 1920x1200 with even a small overclock you should be in the clear
I use my native 1680 x 1050 and as for cpu i'm running it on TRUE so 3.4 , 3.6 shouldnt be a problem.
As for the games i.e mw2, bfbc2, etc...
Thanks in advance