Stela, both systems have the same issue. The video shares memory with the CPU. Check out the list.
http://www.notebookcheck.net/Compari...rds.130.0.html
You will see video cards listed by Classes. I would recommend no less than a Class 2 card and a Class 1 if you can afford it. If you venture into the Class 3 cards, at LEAST make sure that the card has dedicated memory on the card. The list provided is from fastest to slowest. Use this as a guide to get the most bang for your buck. If money is a primary concern, I would rather see you get a used computer with better specs than to get a new one that you won't be happy with. This is the biggest trade-off with using a notebook. They under-power everything to save battery and heat. You could get a nice shuttle case and computer for the same $$ and will be able to upgrade as your needs change.