Sandi1987 wrote:

I don't have 3D Acceleration in Windows 98. Even 3DMark 99 not working. This GPU support Windows 98 or not?

Might seem like a basic question but are you using windows 98 drivers?

What machine is it in?

Moved to Video.

Install the drivers from here! (Catalyst Software Suite)
http://support.amd.com/en-us/download/archive/radeonaiw-98me

I install AGP Driver for Chipset and it's working.