I've not tried a Savage card, as I don't have one.
The card is a Diamond Viper II which is very different from the conventional Savage cards. Totally different chip using a similar name. Sadly it got abandoned when Diamond went Sonic Blue and S3 went to VIA.
In 16 bit mode there appear to be four images of what's supposed to be the screen across the top of the monitor.
In 32 bit mode it's similar but much smaller and more images across.
Neither is readable but you can see pixels change when you move the mouse pointer around.