Difference between ESP32-WROVER and ESP32-WROVER-B

[prdinesh]

What is the difference between ESP32-WROVER and ESP32-WROVER-B modules?

Does ESP32-WROVER-B has more PSRAM than ESP32-WROVER?

[ESP_Lvxinyue]

What is the difference between ESP32-WROVER and ESP32-WROVER-B modules?

Does ESP32-WROVER-B has more PSRAM than ESP32-WROVER?

Hi,

They both have 8 MB PSRAM. ESP32-WROVER has PSRAM that operates at 1.8 V and can support up to 144 MHz clock rate.
ESP32-WROVER-B has PSRAM that operates at 3.3 V and can support up to 133 MHz clock rate. ESP32-WROVER-B is also available with custom flash sizes of 8 MB or 16 MB. More variants can be found here: https://www.espressif.com/sites/default ... ion_en.pdf.

Thanks.

[ESP_Sprite]

Note that for ESP32 use, the maximum clock rate does not really matter as the ESP32 does not interface with external memories at speeds over 80MHz.

[fivdiAtESP32]

What is the difference between ESP32-WROVER and ESP32-WROVER-B modules?

Does ESP32-WROVER-B has more PSRAM than ESP32-WROVER?

Hi,

They both have 8 MB PSRAM. ESP32-WROVER has PSRAM that operates at 1.8 V and can support up to 144 MHz clock rate.
ESP32-WROVER-B has PSRAM that operates at 3.3 V and can support up to 133 MHz clock rate. ESP32-WROVER-B is also available with custom flash sizes of 8 MB or 16 MB. More variants can be found here: https://www.espressif.com/sites/default ... ion_en.pdf.

Thanks.

I'm not sure if this is always true. For example, I have an ESP-WROVER-KIT V3 with an ESP32-WROVER module that only appears to have 4MB of PSRAM. I also have an ESP-DevKitC V4 with an ESP32-WROVER-B module which has 8MB of PSRAM.

In menuconfig "Component config > ESP32-specific > SPI RAM config > Type of SPI RAM chip in use" there are three options:
- (X) Auto-detect-
- ( ) ESP-PSRAM32 or IS25WP032
- ( ) ESP-PSRAM64 or LY68L6400

The fact that there are options for 4 MB (ESP-PSRAM32) and 8 MB (ESP-PSRAM64) indicates to me that there are modules with 4 MB of PSRAM and the ESP32-WROVER on my ESP-WROVER-KIT V3 appears to be one of these modules.

[ESP_Lvxinyue]

What is the difference between ESP32-WROVER and ESP32-WROVER-B modules?

Does ESP32-WROVER-B has more PSRAM than ESP32-WROVER?

Hi,

They both have 8 MB PSRAM. ESP32-WROVER has PSRAM that operates at 1.8 V and can support up to 144 MHz clock rate.
ESP32-WROVER-B has PSRAM that operates at 3.3 V and can support up to 133 MHz clock rate. ESP32-WROVER-B is also available with custom flash sizes of 8 MB or 16 MB. More variants can be found here: https://www.espressif.com/sites/default ... ion_en.pdf.

Thanks.

I'm not sure if this is always true. For example, I have an ESP-WROVER-KIT V3 with an ESP32-WROVER module that only appears to have 4MB of PSRAM. I also have an ESP-DevKitC V4 with an ESP32-WROVER-B module which has 8MB of PSRAM.

In menuconfig "Component config > ESP32-specific > SPI RAM config > Type of SPI RAM chip in use" there are three options:
- (X) Auto-detect-
- ( ) ESP-PSRAM32 or IS25WP032
- ( ) ESP-PSRAM64 or LY68L6400

The fact that there are options for 4 MB (ESP-PSRAM32) and 8 MB (ESP-PSRAM64) indicates to me that there are modules with 4 MB of PSRAM and the ESP32-WROVER on my ESP-WROVER-KIT V3 appears to be one of these modules.

Hi,

ESP32-WROVER module integrated 4 MB of PSRAM before. It was about in June that 4 MB PSRAM was replaced with 8 MB version. I believe there are still previous versions of dev boards with 4 MB PSRAM module out there.