I see my integrated graphics card listed when I go to 'About this Mac'.
15-inch, Mid 2012
OS X El Capitan
Processor 2.3GHz Intel Core i7
Graphics Intel HD Graphics 4000 1024 MB
500GB SATA hard drive
But what is the deal with my NVIDIA dedicated graphics card? Can I make it my primary and the integrated Intel HD Graphics secondary? How do I know if it's being utilized when I watch movies or play games?