Fact · Speech recognition
512kilobytes of internal SRAM
The ESP32-S3 is a dual-core processor that runs at 240 MHz and has 512 KB of internal SRAM.
Checked against its source on October 17, 2026
In the source's own words
“ESP32-S3 is a dual-core XTensa LX7 MCU, capable of running at 240 MHz. Apart from its 512 KB of internal SRAM”
ESP32-S3: Espressif product overview, Espressif Systems, 2026, Overview.
Open the original- What it measures
- This is the on-chip working memory of the ESP32-S3 microcontroller. Modules built on the chip can add external PSRAM, but the 512 KB is the memory the processor uses directly.
- What it does not show
- The page gives the on-chip SRAM only. It does not say how much memory a speech model needs, and a board's external memory varies by module.