Can i add a external graphics card?

[made this just to ask this]

So since i have this like "mini" PC i cant add another graphics card internally cause there's no room, so i was looking into external graphics cards and i was wondering if i could even hook it up this is my PC

http://www.amazon.com/Dell-Inspiron-i3646-1000BLK-Discontinued-Manufacturer/dp/B00KE80VV6

and if so what graphics card would you suggest?

 

[popatim]

It doesnt even have pcie slots to use a graphics card with...