Now we're getting somewhere.
I'm pretty sure there are no 'External' video cards and if there are...they would cost a bit more.
One thing I
Do know...Your system could use more RAM. Playing games on a machine that
just makes the min requirements, usually means slow gameplay, choppy video and frequent crashes.
Take a look at this site...
Curcial. It will help you figure out, What kind of Ram, What speed, How much you can add and Price. Then, you can shop around for better deals.
**If your system is
not listed...click 'support page', under 'service and support'. Then under 'RAM support', click 'Download the Belarc Advisor'.