Currently Being ModeratedDec 26, 2012 10:23 PM (in response to jas7122)
The NVIDiA card will kick in as needed. To get an idea of when it's in use, download and install Cody Krieger's gfxCardStatus - it will let you know which GPU is being used at a given time and which apps or hardware are dependent on the NVIDIA GPU.
Currently Being ModeratedDec 27, 2012 2:29 AM (in response to Barry Fisher)
That's not functionality that can always be relied upon. Sometimes it works fine, other times it doesn't. The program should primarily be used for informational purposes, as Clinton alluded to.