basic graphics

I am a first year student of computer engineering And I have to give a presentation in graphical systems. I would like to know the various bottlenecks in the graphical architecture during interactions with the OS. Please some-one help me.

Maybe this is best in the advanced forum

The question is not hard but it will take around 2000 posts to explain you everything.There are some very good documents out there that expain the common and the different things.Google will give good results and there are plenty of tutorials demostrating some system things.Good Luck!