Only half of RAM avaliable on Rock Pi 4B

Hello there,
I just want to ask if it is normal if sometimes only half of the memory is avaliable. It shows 919.88MB Ram on external sources (resource monitors) and 920MB when I execute “htop” although I have the 2GB model. Is this normal?

Hi there, its not normal, I would confirm the U Boot settings, if I’m not wrong there is one of the settings that limits memory