Logic board with upgraded onboard 2.8GHz Core i7 (i7-4980HQ) processor, 16GB memory, and discrete graphics (DG) option. The CPU, GPU, and RAM are all soldered to the board and are not replaceable.
MacBook Pro / MacBookPro11,2 / 2.0 GHz - i7 - ( Late 2013, 15-Inch )
MacBook Pro / MacBookPro11,3 / 2.3 GHz - i7 - ( Late 2013, 15-Inch )
Product details
661-00680 820-3787 MacBook Pro 15inch 2.8GHz 16GB A1398 Mid 2014 Retina Logic Board Discrete GPU NB-5286W This is a replacement 2.8GHz logic board for the Retina MacBook Pro released in Mid 2014 with 16GB of RAM. Apple part number: 661-00680
Compatible models: Macbook Pro (Retina 15-inch Mid 2014), A1398