Premiere CC- new macbook graphics performance

[Alan Stephens]

I am considering replacing my 15″ 2012 MackBook pro, with a similar current model to increase performance with the Adobe software, Premeire, AFX, ME.
My MacBook has performed great with HD using its Nvidia graphics card. Now that I’m starting to put 4k on my timelines its a bit of a stretch.These new MacBooks don’t have an Nvidia but an Intel based graphics card. Can some one tell me if the performance is tuned for Premiere mercury playback engine like the Nvidia was? I don’t want to go backwards.

Alan Stephens

Mac Book Pro 2.6, quad i7, 8 GB Ram, NVIDIA GeForce GT 650M 1024 MB, OS X Yosemite 10.10.5
Thunderbolt Promise raid drive