Which graphic card is best for gaming?

I want to get a new laptop so I can play games and is just a general update from my current laptop. However I mainly want to use it for games so I can play with my friends and need some help for which graphic I should get. I think I am going to get an intel i3 processor by the way, if that effects which graphic card for you. Also I would like to know whether an Integrated or dedicated graphic card is better for gaming