MJSBLUES :
Don't get an i7 for gaming, there only a tiny bit better for gaming than i5 (but better at other things of course) If you don't plan to overclock, don't get the 3470, get the 3550 it's much better for only a bit more money.
thnx bro
my config will be i5 3550, 7950 with boost 3gb , 8gb 1600 mhz Ram, assrock z77 extreme 4, tt- smart m550w psu - is there any chance of bottleneck ?
i m also confused with MOBO as i want an crossfire x enabled MOBO ( with at least 2 PCI X16) which should i buy? i will not oc my cpu or gpu so is it worth to buy an asrock z77 ?