AsucaHayashi posted... the problem with this is that most people who wonder about system reqs usually lack the knowledge to determine whether their own hardware falls above or below them to begin with.
so yeah this topic won't really go anywhere unlike the "official" can diablo 3 run on my computer topic.
Meh, well I tried
We're Americans! We don't quit just because we're wrong. We just keep doing the wrong thing until it turns out right.
NVIDIA® GeForce® 7800 GT or ATI Radeon™ X1950 Pro or better
Here's the problem.
What is "or better"? Do the numbers always match product value (e.g. GeForce 8000 GT > GeForce 7800 GT?)? Are Video Card values subjective at all? Do they always perform at a specific level despite the other aspects of a computers' configuration?
The processor will have to be accounted for, but here's a list of tiered laptop graphic cards: http://www.notebookcheck.net/NVIDIA-GeForce-315M.41529.0.html
Upper "class 4" and higher will probably be the minimum graphics processing needed for laptops. Desktop graphic processors should be fine even lower down the list. However, the laptop should need more than integrated graphic chips to play smoothly.
Here's a chart based on today's games: http://www.notebookcheck.net/Computer-Games-on-Laptop-Graphic-Cards.13849.0.html