It might be a defective module.
Please also make sure to enable: PSRAM enabled the options menu
I have checked it with an ESP-CAM module that I have:
void setup()
{
Serial.begin(115200);
delay(250);
// Setup WiiMote
if (psramInit())
printf("PSRAM init OK\n");
printf("PSRAM size: %d\n", ESP ...

Hi
Edit this file in the SDK:
esp32-hal-psram.c
Change the following line:
#if CONFIG_SPIRAM_SUPPORT || CONFIG_SPIRAM
to
#if 1
Then just choose the regular ESP32 Dev kit

Use this code to init the pSARM
if (psramInit())
printf("PSRAM init OK\n");
printf("PSRAM size: %d\n", ESP.getFreePsram());

Thanks for your answer ...
I am aware of it
Tried all options, still same starnge behaviuor

ESP32:
I have an interrupt service routine written in Assembly
I am trying to call a C function and get a double exception error.
Any Idea?

movi a14, intFunc
callx0 a14

extern "C" void IRAM_ATTR intFunc()
{
counter2++;
}