This logic board has an upgraded onboard Intel 1.1GHz Core m (m3-6Y30) processor, 8GB of memory, and 256GB of flash storage. The processor, memory, and SSD storage are soldered to the board so the only way to upgrade is by replacing the entire logic board.
661-04728 Logic Board 1.1 GHz (8GB) – 256GB/US for MacBook 12-inch Early 2016 A1534 This is a replacement logic board for the 12-inch MacBook Retina released in early 2016. The logic board has 8GB of onboard RAM and 256GB of flash storage.