I haven't played it yet. I'm looking to buy. I already knew I would have to get another graphics card, but I want to make sure I can play it maxed out before I make a permenent decision.
This isn't very helpful. You will not be able to max out Cryis 2 with a GTS 450.
You also havn't answerd an important question which has been asked which was, what resolution do you play at, or in other words what resolution is your monitor?