SDRAM and LEDS

[sasaga]

Recently I was testing the project on a Mangopi mcore h616 and it has worked great, I have had some errors that I would like to know if you can help me to solve them, my card has 1GB of RAM but the operating system is recognizing 512MB and the leds of the card are not lighting, do you know how I could get it to work.

Thanks in advance.