Can‘t Get Millions of Colors at 1152x870

Power Computing provided the information in this article and it was deemed accurate as of 14 November 1997. Apple Computer, Inc. is not responsible for its content. This article is being provided as is and will not be updated in the future.

I have 4 MB of on-board VRAM, but I can't get millions of colors at any resolution higher than 1024x768. The manual says I should get millions of colors at 1152x870. What is wrong?
The built-in (on-board) video on "Catalyst"-based machines only supports 24-bit color at resolutions up to 1024x768. The manuals are wrong when they indicate higher resolutions support millions of colors. Sales literature for Catalyst-based machines correctly indicates the limitations of on-board video. Apple's 7200 machine, which shares the Catalyst architecture, also has this limitation.

Machines Affected: PowerCurve, PowerCenter, PowerTower
Published Date: Feb 20, 2012