Does anyone know how LEDs built into RAM modules are controlled from a hardware point of view? Can you just send control information over the channels that data to be stored in memory also uses to get into the module? Does it mean that you need to install drivers for them? What happens if you do not?

Update: DDR4 modules seem to have pins for a built-in SMB/I2C bus. Maybe this is used for controlling the LEDs. // It looks like it:

https://www.reddit.com/r/hardware/comments/aiwrt2/how_does_r...

https://gitlab.com/CalcProgrammer1/KeyboardVisualizer/-/issu...