I'm sure you can force it to 32x as well, although there is no real reason for it. You could try Crysis 2 I guess.

Have you touched the game settings that aren't actually changed inside the game?

You have also not supplied information about your screen's resolution. If you're using something like 1280x800 you will probably be unable to max your card in any game. If you're using 2560x1600, you might have a better chance at doing that.

Also, what is your definition of "handle it well"? 30 fps? 60?