What hardware u can upgrade?
ram, storage, graphic card... ?
2.2 GHz (Turbo Boost up to 3.4 GHz) or 2.5 GHz (Turbo Boost up to 3.7 GHz) quad-core Intel Core i7 processor with 6MB shared L3 cache.
Storage only . . . possibly at this time there is no 3rd party drive for the 14/14 models.
So buy it the way you want it (or in the maximum configuration).
RAM and GPU are soldered to the logic board.
If this answer is acceptable please remember to return and mark it accepted.