The back of the logic board revealed:

Hynix H5TC2G83CFR DDR3L SDRAM 2Gbit 1600MHz chips

Hynix H5GQ2H24AFR - 2.5GHz 2Gbit GDDR5 memory chips

Texas Instruments Stellaris LM4FS1AH microcontroller with integrated ARM core

Renesas R4F2113 H8S series CISC MCU

Maxim MAX15119 Apple-specific IMVP7 CPU/GPU power controller

Cypress Semiconductor CY8C24794-24L - a Programmable SoC