I have read so many different articles on this it is doing my brain in.
I own a macbook pro with the the 750M Nvidia GPU.
I am thinking of retiring it for a Iris Pro only model to save battery.
I dont do much 3D or Video and I don't game.
I also am not interested in saving a couple of minutes on massive renders. Although I still want a responsive system.
There is so many performance graphs on the web but all I am interested in is;
What functionality am I losing if I ditch the discreet gnu?
I would think in terms of "future proofing". Discrete is better than Integrated and Photoshop does tax graphics with each generation.
Dedicated vram 1-2 GB is best IMO than shared ram. But lets hear from others: