this computer is looking pretty basic hate to tell you but if you want a good gaming pc your looking at closer to the $500-$600 mark and the processor is not big enough for CoD you will need an i5 or an i7. i am curently on a dell lattitude E4310 with i3 processor and 4gb ram it runs farley fast but wen you give it something like CoD it gets a little jumpy. BUT you can find the same pc as me with an i5 and 2gb graphics
for $650 used or $1,679 brand new.
try eBay, anything with core i5 and 2gb graphics will be fine. these brands are great: dell, ASUS, samsung, hp, acer and msi. hope this helps