which graphics cards does MacBook Pro (Retina, 15-inch, Mid 2014) have?
Apple sold many different versions of the 2014 MBP - different SSD sizes, different RAM amounts, different processors, and on the most expensive machines, a dedicated graphics card.

You may have a machine with only integrated (Intel Iris Pro) graphics. To learn whether or not you are right about only having integrated graphic, you need to know the exact MBP model you have.

One easy way to determine which model yours is:


Go to the Apple (top left of screen) and choose "About this Mac".
Look at the pop up window and find the serial number listed at the bottom. Copy it.
Go to www.everymac.com/ultimate-mac-lookup/ and paste your serial number where it says Enter Identifier.
This will bring you to a page with the model of your machine. There you can see all of the specs. If the name has a (DG) after it, then you have a model with dedicated graphics. If it has an (IG) after it, you don't. This is an example with dedicated graphics: