It will play most modern games on high settings at good resolutions. It's a great gaming card. Not the best, but you'll be very happy with it. You can play very comfortably with great graphics at 1080p.
In some games, such a Crysis 2 and Battlefield 3, you would have to turn down the settings some, but even on medium they look great.
The resolution probably wouldn't be higher than 720p depending on the monitor I decide on(tight budget haha), so do you think I'd be able to play higher end games at the lower resolution and get a better frame rate?