Hi 0lala,
Maybe I can shed some light

Let me explain how turbocache works. It draws on your notebook memory whenever intensive performance is needed. If your system has 1GB of ram, you can definitely expect decent performance in the latest games. Many will testify to the card being able to run games such as BF2, CS:S, WOW, FEAR, Q4.
However, do not expect the impossible from the card. At the least, I would think that any current game would run smoothly at medium settings and at a resolution below 1280x768(800).
I am no expert in this field and would suggest you seek assistance from seasoned IT, specifically notebook, users. A great forum to visit would be www.notebookforums.com
Note that Dell's flagship performance/portability notebook, the Dell M1210 from the XPS line has that card.
Good luck, have fun, and let us know how you go with it!
Rmyfrm