Dell n5050 best buy

no sorry laptops are not upgrade friendly. at most you can upgrade the processor, ram, hard drive. in most cases the video graphics are integrated onto the motherboard

Like said, the video card on a laptop cannot be upgraded. Some of the more expensive laptops, however, provide you with such an offer.

I haven't look into your particular laptop, but if you read this article about external video cards for laptops maybe you can find your answer

http://forum.notebookreview.com/e-gpu-external-graphics...