It doesn't have an option to select the video card, and you'll be stuck playing games on low details at best with the card it comes with. (Mobile 5650)
Use this list http://www.notebookcheck.net/Mobile-Graphics-Cards-Benchmark-List.844.0.html
to compare the performance of different mobile video cards.
My rough estimation puts the mobile HD5650 close to the desktop HD5570 performance wise, where you'll want something close to at least desktop HD5770 performance. (A 5770 is essentially 2 5570's)
Look for something with a mobility 5850 at least. (Which is really closer to a desktop 5750, but about as good as you may find even close to your price range)