You Video Card is integrated my friend!
Buying a better Video Card will help you a lot
I got a Geforce 9600 GT and it's kicking A** for now
I can play every game on 1440 x 900 Medium high Settings
If you want to know how your games are running (if they are slow or good) you can use Fraps to measure your Frames Per Second (Fps)
every game is playable between 30 and 60 fps (everything below 30 fps will start to slowdown, everything above 60 fps will start to flicker depending on your Monitor)
www.fraps.com (it's free to download)