Ubuntu - GPU - AMD GPU - Monitor - Manually - Check the GPU VRAM Size

cat /sys/class/drm/card0/device/mem_info_vram_total

returns:

25753026560

NOTE: This indicates 24 Gb.

Use the Xorg log file to get the GPU Memory

grep -i --color memory /var/log/Xorg.0.log

returns:

[    16.240] (II) FBDEV(0): hardware: EFI VGA (video memory: 3072kB)

NOTE: This shows the video memory.