Would the gtx660 be enough?

I really liked it. Minus the voice acting's fake russian accents, its very atmospheric and the game mechanics like the gas mask and ammo conservation add to immersing you into the world.

Be sure you have a beefy enough computer to run it. I barely squeeze 30 frames out of my gtx 295 when theres a lot of action at once. Mind you I am running on high settings.

Is this game good?