Another computer

Question

wondering if you can take a look at this computer that i am going to buy it is sort of like the last one i was about to buy but this has a 2 DDR not 3 DDR

here is the website if you can take a look at it and tell me if this is a good gaming computer; not a hard core gaming computer but one that can at least play call of duty 4 or something like that.
http://www.bestbuy.com/site/olspage.jsp?skuId=8771279&productCategoryId=abcat0502001&type=product&tab=2&id=1203815723334#productdetail