The Macintosh IIci does not use VRAM (video RAM), nor can be expanded with
VRAM. The computer uses main system RAM from Bank A of the logic board.
If there is at least 2MB of RAM on the logic board, you will be able to
access the maximum pixel depth for the attached monitor: for a
High-Resolution RGB Monitor set to 256 colors, that amounts to 384K of RAM
taken for video.