This logic board has an upgraded onboard Intel 1.2GHz Core m5-6Y54 processor, 8GB of memory, and a 512GB SSD. The processor, memory, and SSD storage are soldered to the board so the only way to upgrade is by replacing the entire logic board.
661-04730 Logic Board 1.2 GHz (8GB) – 512GB/FCC 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 512GB of flash storage.