This site helps to see if your computer can support. It connects to your computer and you choose the game you want. Than it will see if the game can support it. It is a great way to see if the game will work on your computer before buying it.
Example: I thought Modern Warfare 2 wouldn't run in my PC. I am wrong :o
Link to site: <!-- m --><a class="postlink" href="http://www.systemrequirementslab.com/cyri/intro.aspx">http://www.systemrequirementslab.com/cyri/intro.aspx</a><!-- m -->