For ESP32-S3 N16R8 storage mark, 16 MB flash and 8 MB PSRAM. Flash saves program and data even without power; PSRAM is an additional working memory.

What to check out

• Rate the size of the application, file system and expected updates. These are flash requests.
• Evaluate image buffers, screen buffers or capture data separately. Here, the PSRAM can be useful.
• Adjust flash, PSRAM and partition settings to the actual module and development environment.
• On startup, check the detected capacity and test the maximum expected memory consumption.

A Practical Example

Two graphical buffers of 320 × 240 at 16 bits per pixel require a total of approximately 307 kB before adding any other data. Such a calculation helps to choose the panel.

Common error

PSRAM does not replace all types of internal RAM-but it's not always the same speed. More flash also does not mean any more PSRAM or automatically larger program section.

For further reading

• Espressif: use of external RAM in ESP32-S3 (English). PSRAM settings, uses and external memory limits.

Compatibility check products

Select products according to the above criteria; the list is not a confirmation that they are all interchangeable.

• ESP32-S3 N16R8 WiFi development panel BT 8MB PSRAM