Probably around 20 FPS in BF3 @ that resolution.
Your CPU is what you'll need to upgrade next.
Although it's good for the the money, it's not a lot of money, therefore not that good.
The video card and additionnal ram will ensure that games will be playable. Whether it's in low quality, medium or medium-high, newer titles will play well.
My opinion is that graphics details only account for about 5% of the overall experience you get with a game. If it runs smoothly is much more important.