If you show us the link to the game and tell us what computer parts you have, we can probably see what the problem is (might not be the graphics card only?).
If you download this program, CPU-Z, it can tell you what PC parts your computer is made of if you don't know.
There is no virus or harmful software on it, it is safe.
http://www.cpuid.com/download/cpuz_149.zip
Program link:
http://www.cpuid.com/cpuz.php
EDIT: Nvm, the program doesn't show video card model, how annoying. Damn.
