That is just the MCU, mind you, and I’m not sure what exactly it’s responsible for besides media, but besides whatever AI nonsense they use for self-driving which might have a good chunk of RAM onboard, it seems likely to me that most other computerized components are just using SOC (system-on-chip) processors with integrated onboard memory, not dedicated DDR. I am not an expert though, and may be wrong.
According to this reverse engineering effort, Tesla MCUs have 4GB of DDR4 onboard.
That is just the MCU, mind you, and I’m not sure what exactly it’s responsible for besides media, but besides whatever AI nonsense they use for self-driving which might have a good chunk of RAM onboard, it seems likely to me that most other computerized components are just using SOC (system-on-chip) processors with integrated onboard memory, not dedicated DDR. I am not an expert though, and may be wrong.