Almost no laptops support such an upgrade or require you get the upgrade from the maker. Yes it sounds harsh and while your question is a good one, it doesn't change the answer.
Let's see if anyone drags up that failed laptop video card standard (which won't help you.)
I have an ASUS K60IJ, and it has a crappy graphics card. I've briefly looked into a way to upgrade, but short of taking it apart (something I'm unwilling to do myself) I didn't see a way to do it. The one way I found requires a Expresscard slot, which my laptop does not have. Is there any way I can either get an expresscard adapter, or something else? Thanks in advance.