I have a Dell Inspiron 531. I play online games and would like to boost my performance with a graphics card. I found a great card that I would like to use, but I know little about computers.

The card I want says that it requires 2 slots to install it. Here is a link to my computer:

http://reviews.cnet.com/desktops/dell-inspiron-531/4505-3118_7-32486097.html

If you watch the video the guy opens up the computer but I can not tell if it has 2 slots or not. Can anyone tell by the video if it has 2 slots? Is there anyone with an Inspiron 531 that knows if it has 2 slots or not?
This is the card I want:

http://www.newegg.com/Product/Product.aspx?Item=N82E16814161252
Thanks, for the help.
