Hello, Never noticed this before as I just assumed integrated graphics (I think you can guess my level of computing knowledge and usage style, power up and forget, from this!). When I looked into the system report out of interest I noticed the Intel graphics as expected but also an NVIDIA GeForce GT 650M listed. Now does the computer use both of these or only one at a time that I have to physically select? The "About my Mac" window just lists the integrated graphics and only in the fuller system report do I see the Nvidia card listed. I never realised this and I can't remember this being specced when I bought the computer? I'm not sure whether one is better than the other in use?