I agree something is very wrong. I run the new NEDS in 98se, 2kpro, and xp pro and I get about the same performance in all operating systems, just as it should be.
Make sure you have any AGP drivers, and chipset drivers installed. Also make sure there arn't any drivers for other video cards installed.
Trusting every aspect of our lives to a giant computer was the greatest thing we ever did -Homer