I was looking at the new 15 MacBook Pro and the higher end ones have this "NVIDIA GeForce 9400M + 9600M GT with 512MB". Does this mean they have two graphics card inside them? How does that work?
Thanks.
The MacBook Pros have had two graphics cards since the refresh last October, where have you been?
All unibody MacBook Pros used to have both graphics cards but after this last change it's only the 17" and the higher end 15" models (the 13" and low-end 15" don't have it).
Basically, by default, it's set to "better battery life" mode - where it uses the 9400M card. However, in System Preferences you have the option to change it to "better performance", which turns the integrated 9400M card off and uses the discrete 9600M card instead. It's handy when you want to go from simple web browsing, looking at photos, etc. to video editing, graphic design and the like. You cannot run both cards at the same time.
As said above, it (for some reason) involves the system automatically logging out and back in to switch between the cards, which can be a bit of a pain. I may be wrong but I believe that when you run Boot Camp you can't change what card is being used, and that it'll automatically use the 9600M card.
That's why I love my original 15" 2.4GHz unibody MacBook Pro - it used to be the low end model but still had both cards...unlike the new 15" low-end model
