Most motherboards that having integrated GPUs are only good for normal daily use.
Some AMD motherboards come with an HD 4200/4250, which is enough to handle Source games and other light-usage games.
Intel CPUs have an integrated GPU that can be uses without having a graphics card.
One Intel motherboard by Zotac has a GT430 integrated into it, which is a decent GPU for light gaming.
It's pricey though.
Why do you ask such a question (just out of curiosity)?