The rear-panel HDI-45 connector uses motherboard DRAM to support video.

The 7100 VRAM Card comes with 1MB of soldered video RAM, plus four VRAM SIMM sockets.

A 2MB VRAM configuration is achieved by placing four 256K VRAM SIMMs on the VRAM Card.

The AV Card comes with 2MB of VRAM and is non-upgradeable.  Pixel and viewable color numbers are for graphics only.  When video is enabled, VRAM is split evenly between graphics and video.