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| [* black] Last but far from least, hovering near the SSD slots, we have two custom Apple chips: | |
| [* red] Apple T2 339S00467 layered over SK Hynix [https://www.skhynix.com/static/filedata/fileDownload.do?seq=429|H9HKNNNBRUMUVR|new_window=true]-NLH LPDDR4 | |
| - | [* orange] Apple 338S00268—this |
| + | [* orange] Apple 338S00268—this chip's a bit of a mystery. In our initial excitement we thought it was the [https://www.theverge.com/2017/11/20/16678906/imac-pro-a10-fusion-coprocessor-hey-siri-secure-boot|rumored A10 Fusion coprocessor|new_window=true], first seen in the [guide|67382|iPhone 7|stepid=136535|new_window=true], but the package size is too small (roughly 7.4 mm each side). Best guess: this is an Apple/Dialog Semi power management IC. |
| [* icon_note] The successor to the T1 chip introduced in 2016's MacBook Pro with Touch Bar, the T2 is tasked here with all the functions of the [https://en.wikipedia.org/wiki/System_Management_Controller|SMC|new_window=true], image signal processing for the camera, audio control, and SSD controller, and Secure Enclave, ''and'' a hardware encryption engine. Whew! | |
| [* black] The downside to all this added functionality and security is [https://www.macrumors.com/2017/12/15/bricked-mac-pro-how-to-restore/|a major headache if your iMac Pro ever has to be restored|new_window=true]. |