Humm, now that you mention it...

I've 2 NT servers here which show a "ATI 3D RAGE IIC AGP" card with the same driver version numbers (5.2.040, 4.00). One has the "+DVD" chipset.

At 800x600, they don't go higher than 65536 colors while at 1024x768, 256 colors seems to max it out.

These are lower end ATI 2Mb cards, from what I gather.

I don't think you can squeeze anything more than that out of them.

Make sure you get the latest (and correct) drivers, though.